Merge pull request #548 from muditporwal/master

Checkstyle improvements #539 : Added JavaDocType Rule

abstract-factory/src/test/java/com/iluwatar/abstractfactory/AbstractFactoryTest.java

@@ -28,6 +28,9 @@ import static org.junit.Assert.assertTrue;
 import org.junit.Before;
 import org.junit.Test;
 
+/**
+ * Test for abstract factory
+ */
 public class AbstractFactoryTest {
 
   private App app = new App();

aggregator-microservices/aggregator-service/src/main/java/com/iluwatar/aggregator/microservices/App.java

@@ -25,6 +25,9 @@ package com.iluwatar.aggregator.microservices;
 import org.springframework.boot.SpringApplication;
 import org.springframework.boot.autoconfigure.SpringBootApplication;
 
+/**
+ * Spring Boot EntryPoint Class
+ */
 @SpringBootApplication
 public class App {
 

aggregator-microservices/aggregator-service/src/test/java/com/iluwatar/aggregator/microservices/AggregatorTest.java

@@ -22,15 +22,18 @@
  */
 package com.iluwatar.aggregator.microservices;
 
+import static org.junit.Assert.assertEquals;
+import static org.mockito.Mockito.when;
+
 import org.junit.Before;
 import org.junit.Test;
 import org.mockito.InjectMocks;
 import org.mockito.Mock;
 import org.mockito.MockitoAnnotations;
 
-import static org.junit.Assert.assertEquals;
-import static org.mockito.Mockito.when;
-
+/**
+ * Test Aggregation of domain objects
+ */
 public class AggregatorTest {
 
   @InjectMocks

aggregator-microservices/information-microservice/src/main/java/com/iluwatar/information/microservice/InformationController.java

@@ -26,6 +26,9 @@ import org.springframework.web.bind.annotation.RequestMapping;
 import org.springframework.web.bind.annotation.RequestMethod;
 import org.springframework.web.bind.annotation.RestController;
 
+/**
+ * Controller providing endpoints to retrieve information about products
+ */
 @RestController
 public class InformationController {
 

aggregator-microservices/information-microservice/src/test/java/com/iluwatar/information/microservice/InformationControllerTest.java

@@ -25,6 +25,9 @@ package com.iluwatar.information.microservice;
 import org.junit.Assert;
 import org.junit.Test;
 
+/**
+ * Test for Information Rest Controller
+ */
 public class InformationControllerTest {
 
   @Test

aggregator-microservices/inventory-microservice/src/main/java/com/iluwatar/inventory/microservice/InventoryController.java

@@ -26,6 +26,9 @@ import org.springframework.web.bind.annotation.RequestMapping;
 import org.springframework.web.bind.annotation.RequestMethod;
 import org.springframework.web.bind.annotation.RestController;
 
+/**
+ * Controller providing endpoints to retrieve product inventories
+ */
 @RestController
 public class InventoryController {
 

aggregator-microservices/inventory-microservice/src/test/java/com/iluwatar/inventory/microservice/InventoryControllerTest.java

@@ -25,8 +25,10 @@ package com.iluwatar.inventory.microservice;
 import org.junit.Assert;
 import org.junit.Test;
 
+/**
+ * Test Inventory Rest Controller
+ */
 public class InventoryControllerTest {
-
   @Test
   public void testGetProductInventories() throws Exception {
     InventoryController inventoryController = new InventoryController();

api-gateway/api-gateway-service/src/test/java/com/iluwatar/api/gateway/ApiGatewayTest.java

@@ -22,15 +22,18 @@
  */
 package com.iluwatar.api.gateway;
 
+import static org.junit.Assert.assertEquals;
+import static org.mockito.Mockito.when;
+
 import org.junit.Before;
 import org.junit.Test;
 import org.mockito.InjectMocks;
 import org.mockito.Mock;
 import org.mockito.MockitoAnnotations;
 
-import static org.junit.Assert.assertEquals;
-import static org.mockito.Mockito.when;
-
+/**
+ * Test API Gateway Pattern
+ */
 public class ApiGatewayTest {
 
   @InjectMocks

api-gateway/image-microservice/src/test/java/com/iluwatar/image/microservice/ImageControllerTest.java

@@ -25,6 +25,9 @@ package com.iluwatar.image.microservice;
 import org.junit.Assert;
 import org.junit.Test;
 
+/**
+ * Test for Image Rest Controller
+ */
 public class ImageControllerTest {
   @Test
   public void testGetImagePath() {

api-gateway/price-microservice/src/test/java/com/iluwatar/price/microservice/PriceControllerTest.java

@@ -25,6 +25,10 @@ package com.iluwatar.price.microservice;
 import org.junit.Assert;
 import org.junit.Test;
 
+
+/**
+ * Test for Price Rest Controller
+ */
 public class PriceControllerTest {
   @Test
   public void testgetPrice() {

async-method-invocation/src/main/java/com/iluwatar/async/method/invocation/AsyncResult.java

@@ -25,8 +25,8 @@ package com.iluwatar.async.method.invocation;
 import java.util.concurrent.ExecutionException;
 
 /**
- * 
  * AsyncResult interface
+ * @param <T> parameter returned when getValue is invoked
  */
 public interface AsyncResult<T> {
 

checkstyle.xml

@@ -77,7 +77,6 @@
             <property name="max" value="120"/>
             <property name="ignorePattern" value="^package.*|^import.*|a href|href|http://|https://|ftp://"/>
         </module>
-        <module name="AvoidStarImport"/>
         <module name="OneTopLevelClass"/>
         <module name="NoLineWrap"/>
         <module name="EmptyBlock">
@@ -185,6 +184,10 @@
             <property name="allowedAnnotations" value="Override, Test, Before, After, Parameters, Given, When, BeforeClass, AfterClass, Parameterized"/>
             <property name="allowThrowsTagsForSubclasses" value="true"/>
         </module>
+        <module name="JavadocType">
+            <property name="scope" value="public"/>
+            <property name="allowUnknownTags" value="true"/>
+        </module>
         <module name="MethodName">
             <property name="format" value="^[a-z][a-z0-9][a-zA-Z0-9_]*$"/>
             <message key="name.invalidPattern"

dao/src/main/java/com/iluwatar/dao/CustomerSchemaSql.java

@@ -22,6 +22,9 @@
  */
 package com.iluwatar.dao;
 
+/**
+ * Customer Schema SQL Class
+ */
 public final class CustomerSchemaSql {
 
   private CustomerSchemaSql() {}

dao/src/test/java/com/iluwatar/dao/CustomerTest.java

@@ -29,6 +29,9 @@ import static org.junit.Assert.assertNotEquals;
 import org.junit.Before;
 import org.junit.Test;
 
+/**
+ * Tests {@link Customer}.
+ */
 public class CustomerTest {
 
   private Customer customer;

data-mapper/src/main/java/com/iluwatar/datamapper/Student.java

@@ -21,6 +21,9 @@ package com.iluwatar.datamapper;
 
 import java.io.Serializable;
 
+/**
+ * Class defining Student
+ */
 public final class Student implements Serializable {
 
   private static final long serialVersionUID = 1L;

data-mapper/src/main/java/com/iluwatar/datamapper/StudentDataMapper.java

@@ -20,6 +20,9 @@ package com.iluwatar.datamapper;
 
 import java.util.Optional;
 
+/**
+ * Interface lists out the possible behaviour for all possible student mappers
+ */
 public interface StudentDataMapper {
 
   Optional<Student> find(int studentId);

data-mapper/src/main/java/com/iluwatar/datamapper/StudentDataMapperImpl.java

@@ -22,6 +22,9 @@ import java.util.ArrayList;
 import java.util.List;
 import java.util.Optional;
 
+/**
+ * Implementation of Actions on Students Data
+ */
 public final class StudentDataMapperImpl implements StudentDataMapper {
 
   /* Note: Normally this would be in the form of an actual database */

data-mapper/src/test/java/com/iluwatar/datamapper/StudentTest.java

@@ -18,10 +18,14 @@
  */
 package com.iluwatar.datamapper;
 
-import org.junit.Test;
-import static org.junit.Assert.assertTrue;
 import static org.junit.Assert.assertFalse;
+import static org.junit.Assert.assertTrue;
 
+import org.junit.Test;
+
+/**
+ * Tests {@link Student}.
+ */
 public final class StudentTest {
 
   @Test

delegation/src/main/java/com/iluwatar/delegation/simple/PrinterController.java

@@ -22,6 +22,12 @@
  */
 package com.iluwatar.delegation.simple;
 
+/**
+ * Delegator Class to delegate the implementation of the Printer.
+ * This ensures two things:
+ *  - when the actual implementation of the Printer class changes the delegation will still be operational
+ *  - the actual benefit is observed when there are more than one implementors and they share a delegation control
+ */
 public class PrinterController implements Printer {
 
   private final Printer printer;

delegation/src/test/java/com/iluwatar/delegation/simple/AppTest.java

@@ -23,7 +23,9 @@
 package com.iluwatar.delegation.simple;
 
 import org.junit.Test;
-
+/**
+ * Application Test Entry
+ */
 public class AppTest {
 
   @Test

delegation/src/test/java/com/iluwatar/delegation/simple/DelegateTest.java

@@ -22,22 +22,24 @@
  */
 package com.iluwatar.delegation.simple;
 
+import static org.junit.Assert.assertEquals;
+
 import ch.qos.logback.classic.Logger;
 import ch.qos.logback.classic.spi.ILoggingEvent;
 import ch.qos.logback.core.AppenderBase;
 import com.iluwatar.delegation.simple.printers.CanonPrinter;
 import com.iluwatar.delegation.simple.printers.EpsonPrinter;
 import com.iluwatar.delegation.simple.printers.HpPrinter;
+import java.util.LinkedList;
+import java.util.List;
 import org.junit.After;
 import org.junit.Before;
 import org.junit.Test;
 import org.slf4j.LoggerFactory;
 
-import java.util.LinkedList;
-import java.util.List;
-
-import static org.junit.Assert.assertEquals;
-
+/**
+ * Test for Delegation Pattern
+ */
 public class DelegateTest {
 
   private InMemoryAppender appender;
@@ -78,6 +80,9 @@ public class DelegateTest {
     assertEquals("Epson Printer : Test Message Printed", appender.getLastMessage());
   }
 
+  /**
+   * Logging Appender
+   */
   private class InMemoryAppender extends AppenderBase<ILoggingEvent> {
 
     private List<ILoggingEvent> log = new LinkedList<>();

dependency-injection/src/test/java/com/iluwatar/dependency/injection/utils/InMemoryAppender.java

@@ -30,6 +30,10 @@ import org.slf4j.LoggerFactory;
 import java.util.LinkedList;
 import java.util.List;
 
+
+/**
+ * InMemory Log Appender Util.
+ */
 public class InMemoryAppender extends AppenderBase<ILoggingEvent> {
 
   private List<ILoggingEvent> log = new LinkedList<>();

double-dispatch/src/test/java/com/iluwatar/doubledispatch/CollisionTest.java

@@ -22,13 +22,14 @@
  */
 package com.iluwatar.doubledispatch;
 
-import java.util.Objects;
-
 import static org.junit.Assert.assertEquals;
 
+import java.util.Objects;
+
 /**
  * Date: 12/10/15 - 8:37 PM
- *
+ * Test for Collision
+ * @param <O> Type of GameObject
  * @author Jeroen Meulemeester
  */
 public abstract class CollisionTest<O extends GameObject> {

event-aggregator/src/test/java/com/iluwatar/event/aggregator/EventEmitterTest.java

@@ -22,22 +22,22 @@
  */
 package com.iluwatar.event.aggregator;
 
-import org.junit.Test;
-
-import java.util.Objects;
-import java.util.function.Function;
-import java.util.function.Supplier;
-
 import static org.mockito.Matchers.eq;
 import static org.mockito.Mockito.mock;
 import static org.mockito.Mockito.times;
 import static org.mockito.Mockito.verify;
-import static org.mockito.Mockito.verifyZeroInteractions;
 import static org.mockito.Mockito.verifyNoMoreInteractions;
+import static org.mockito.Mockito.verifyZeroInteractions;
+
+import java.util.Objects;
+import java.util.function.Function;
+import java.util.function.Supplier;
+import org.junit.Test;
 
 /**
  * Date: 12/12/15 - 10:58 PM
- *
+ * Tests for Event Emitter
+ * @param <E> Type of Event Emitter
  * @author Jeroen Meulemeester
  */
 public abstract class EventEmitterTest<E extends EventEmitter> {

event-asynchronous/src/main/java/com/iluwatar/event/asynchronous/EventDoesNotExistException.java

@@ -16,6 +16,9 @@
  */
 package com.iluwatar.event.asynchronous;
 
+/**
+ * Custom Exception Class for Non Existent Event
+ */
 public class EventDoesNotExistException extends Exception {
 
   private static final long serialVersionUID = -3398463738273811509L;

event-asynchronous/src/main/java/com/iluwatar/event/asynchronous/IEvent.java

@@ -16,6 +16,10 @@
  */
 package com.iluwatar.event.asynchronous;
 
+/**
+ * Events that fulfill the start stop and list out current status behaviour
+ * follow this interface
+ */
 public interface IEvent {
 
   void start();

event-asynchronous/src/main/java/com/iluwatar/event/asynchronous/InvalidOperationException.java

@@ -16,6 +16,9 @@
  */
 package com.iluwatar.event.asynchronous;
 
+/**
+ * Type of Exception raised when the Operation being invoked is Invalid
+ */
 public class InvalidOperationException extends Exception {
 
   private static final long serialVersionUID = -6191545255213410803L;

event-asynchronous/src/main/java/com/iluwatar/event/asynchronous/LongRunningEventException.java

@@ -16,6 +16,9 @@
  */
 package com.iluwatar.event.asynchronous;
 
+/**
+ * Type of Exception raised when the Operation being invoked is Long Running
+ */
 public class LongRunningEventException extends Exception {
 
   private static final long serialVersionUID = -483423544320148809L;

event-asynchronous/src/main/java/com/iluwatar/event/asynchronous/MaxNumOfEventsAllowedException.java

@@ -16,6 +16,9 @@
  */
 package com.iluwatar.event.asynchronous;
 
+/**
+ * Type of Exception raised when the max number of allowed events is exceeded
+ */
 public class MaxNumOfEventsAllowedException extends Exception {
 
   private static final long serialVersionUID = -8430876973516292695L;

event-asynchronous/src/main/java/com/iluwatar/event/asynchronous/ThreadCompleteListener.java

@@ -16,6 +16,9 @@
  */
 package com.iluwatar.event.asynchronous;
 
+/**
+ * Interface with listener behaviour related to Thread Completion.
+ */
 public interface ThreadCompleteListener {
   void completedEventHandler(final int eventId);
 }

event-driven-architecture/src/main/java/com/iluwatar/eda/framework/Handler.java

@@ -25,6 +25,7 @@ package com.iluwatar.eda.framework;
 /**
  * This interface can be implemented to handle different types of messages.
  * Every handler is responsible for a single of type message
+ * @param <E> Handler can handle events of type E
  */
 public interface Handler<E extends Event> {
 

factory-kit/src/main/java/com/iluwatar/factorykit/Axe.java

@@ -22,6 +22,9 @@
  */
 package com.iluwatar.factorykit;
 
+/**
+ * Class representing Axe
+ */
 public class Axe implements Weapon {
   @Override
   public String toString() {

factory-kit/src/main/java/com/iluwatar/factorykit/Bow.java

@@ -22,6 +22,9 @@
  */
 package com.iluwatar.factorykit;
 
+/**
+ * Class representing Bows
+ */
 public class Bow implements Weapon {
   @Override
   public String toString() {

factory-kit/src/main/java/com/iluwatar/factorykit/Spear.java

@@ -21,7 +21,9 @@
  * THE SOFTWARE.
  */
 package com.iluwatar.factorykit;
-
+/**
+ * Class representing Spear
+ */
 public class Spear implements Weapon {
   @Override
   public String toString() {

factory-kit/src/main/java/com/iluwatar/factorykit/Sword.java

@@ -21,7 +21,9 @@
  * THE SOFTWARE.
  */
 package com.iluwatar.factorykit;
-
+/**
+ * Class representing Swords
+ */
 public class Sword implements Weapon {
   @Override
   public String toString() {

factory-kit/src/test/java/com/iluwatar/factorykit/app/AppTest.java

@@ -25,6 +25,9 @@ package com.iluwatar.factorykit.app;
 import com.iluwatar.factorykit.App;
 import org.junit.Test;
 
+/**
+ * Application Test Entrypoint
+ */
 public class AppTest {
 
   @Test

factory-kit/src/test/java/com/iluwatar/factorykit/factorykit/FactoryKitTest.java

@@ -1,4 +1,4 @@
-/**
+  /**
  * The MIT License
  * Copyright (c) 2014-2016 Ilkka Seppälä
  *
@@ -22,12 +22,19 @@
  */
 package com.iluwatar.factorykit.factorykit;
 
-import com.iluwatar.factorykit.*;
-import org.junit.Before;
-import org.junit.Test;
-
 import static org.junit.Assert.assertTrue;
 
+import com.iluwatar.factorykit.Axe;
+import com.iluwatar.factorykit.Spear;
+import com.iluwatar.factorykit.Sword;
+import com.iluwatar.factorykit.Weapon;
+import com.iluwatar.factorykit.WeaponFactory;
+import com.iluwatar.factorykit.WeaponType;
+import org.junit.Before;
+import org.junit.Test;
+/**
+ *  Test Factory Kit Pattern
+ */
 public class FactoryKitTest {
 
   private WeaponFactory factory;

feature-toggle/src/test/java/com/iluwatar/featuretoggle/pattern/propertiesversion/PropertiesFeatureToggleVersionTest.java

@@ -23,16 +23,18 @@
 
 package com.iluwatar.featuretoggle.pattern.propertiesversion;
 
-import com.iluwatar.featuretoggle.pattern.Service;
-import com.iluwatar.featuretoggle.user.User;
-import org.junit.Test;
-
-import java.util.Properties;
-
 import static org.junit.Assert.assertEquals;
 import static org.junit.Assert.assertFalse;
 import static org.junit.Assert.assertTrue;
 
+import com.iluwatar.featuretoggle.pattern.Service;
+import com.iluwatar.featuretoggle.user.User;
+import java.util.Properties;
+import org.junit.Test;
+
+/**
+ * Test Properties Toggle
+ */
 public class PropertiesFeatureToggleVersionTest {
 
   @Test(expected = IllegalArgumentException.class)

feature-toggle/src/test/java/com/iluwatar/featuretoggle/pattern/tieredversion/TieredFeatureToggleVersionTest.java

@@ -22,15 +22,18 @@
  */
 package com.iluwatar.featuretoggle.pattern.tieredversion;
 
+import static org.junit.Assert.assertEquals;
+import static org.junit.Assert.assertTrue;
+
 import com.iluwatar.featuretoggle.pattern.Service;
 import com.iluwatar.featuretoggle.user.User;
 import com.iluwatar.featuretoggle.user.UserGroup;
 import org.junit.Before;
 import org.junit.Test;
 
-import static org.junit.Assert.assertEquals;
-import static org.junit.Assert.assertTrue;
-
+/**
+ * Test Tiered Feature Toggle
+ */
 public class TieredFeatureToggleVersionTest {
 
   final User paidUser = new User("Jamie Coder");

feature-toggle/src/test/java/com/iluwatar/featuretoggle/user/UserGroupTest.java

@@ -22,11 +22,14 @@
  */
 package com.iluwatar.featuretoggle.user;
 
-import org.junit.Test;
-
 import static junit.framework.TestCase.assertFalse;
 import static org.junit.Assert.assertTrue;
 
+import org.junit.Test;
+
+/**
+ * Test User Group specific feature
+ */
 public class UserGroupTest {
 
   @Test

fluentinterface/src/main/java/com/iluwatar/fluentinterface/fluentiterable/lazy/DecoratingIterator.java

@@ -27,6 +27,7 @@ import java.util.Iterator;
 /**
  * This class is used to realize LazyFluentIterables. It decorates a given iterator. Does not
  * support consecutive hasNext() calls.
+ * @param <E> Iterable Collection of Elements of Type E
  */
 public abstract class DecoratingIterator<E> implements Iterator<E> {
 

fluentinterface/src/test/java/com/iluwatar/fluentinterface/app/AppTest.java

@@ -23,7 +23,9 @@
 package com.iluwatar.fluentinterface.app;
 
 import org.junit.Test;
-
+/**
+ * Application Test Entry
+ */
 public class AppTest {
 
   @Test

front-controller/src/test/java/com/iluwatar/front/controller/utils/InMemoryAppender.java

@@ -30,6 +30,9 @@ import org.slf4j.LoggerFactory;
 import java.util.LinkedList;
 import java.util.List;
 
+/**
+ * InMemory Log Appender Util.
+ */
 public class InMemoryAppender extends AppenderBase<ILoggingEvent> {
 
   private List<ILoggingEvent> log = new LinkedList<>();

guarded-suspension/src/main/java/com/iluwatar/guarded/suspension/GuardedQueue.java

@@ -28,7 +28,12 @@ import org.slf4j.LoggerFactory;
 import java.util.LinkedList;
 import java.util.Queue;
 
-
+/**
+ * Guarded Queue is an implementation for Guarded Suspension Pattern
+ * Guarded suspension pattern is used to handle a situation when you want to execute a method
+ * on an object which is not in a proper state.
+ * @see http://java-design-patterns.com/patterns/guarded-suspension/
+ */
 public class GuardedQueue {
   private static final Logger LOGGER = LoggerFactory.getLogger(GuardedQueue.class);
   private final Queue<Integer> sourceList;

guarded-suspension/src/test/java/com/iluwatar/guarded/suspension/GuardedQueueTest.java

@@ -29,6 +29,9 @@ import java.util.concurrent.ExecutorService;
 import java.util.concurrent.Executors;
 import java.util.concurrent.TimeUnit;
 
+/**
+ * Test for Guarded Queue
+ */
 public class GuardedQueueTest {
   private volatile Integer value;
 

hexagonal/src/main/java/com/iluwatar/hexagonal/domain/LotteryTicketCheckResult.java

@@ -29,6 +29,9 @@ package com.iluwatar.hexagonal.domain;
  */
 public class LotteryTicketCheckResult {
 
+  /**
+   * Enumeration of Type of Outcomes of a Lottery
+   */
   public enum CheckResult { WIN_PRIZE, NO_PRIZE, TICKET_NOT_SUBMITTED }
 
   private final CheckResult checkResult;

hexagonal/src/test/java/com/iluwatar/hexagonal/domain/LotteryTicketTest.java

@@ -30,6 +30,9 @@ import java.util.HashSet;
 
 import org.junit.Test;
 
+/**
+ * Test Lottery Tickets for equality
+ */
 public class LotteryTicketTest {
 
   @Test

interpreter/src/test/java/com/iluwatar/interpreter/ExpressionTest.java

@@ -22,18 +22,19 @@
  */
 package com.iluwatar.interpreter;
 
-import org.junit.Test;
+import static org.junit.Assert.assertEquals;
+import static org.junit.Assert.assertNotNull;
 
 import java.util.ArrayList;
 import java.util.List;
 import java.util.function.BiFunction;
-
-import static org.junit.Assert.assertEquals;
-import static org.junit.Assert.assertNotNull;
+import org.junit.Test;
 
 /**
  * Date: 12/14/15 - 11:48 AM
  *
+ * Test Case for Expressions
+ * @param <E> Type of Expression
  * @author Jeroen Meulemeester
  */
 public abstract class ExpressionTest<E extends Expression> {

model-view-controller/src/test/java/com/iluwatar/model/view/controller/GiantViewTest.java

@@ -22,20 +22,19 @@
  */
 package com.iluwatar.model.view.controller;
 
+import static org.junit.Assert.assertEquals;
+import static org.mockito.Mockito.mock;
+
 import ch.qos.logback.classic.Logger;
 import ch.qos.logback.classic.spi.ILoggingEvent;
 import ch.qos.logback.core.AppenderBase;
+import java.util.LinkedList;
+import java.util.List;
 import org.junit.After;
 import org.junit.Before;
 import org.junit.Test;
 import org.slf4j.LoggerFactory;
 
-import java.util.LinkedList;
-import java.util.List;
-
-import static org.junit.Assert.assertEquals;
-import static org.mockito.Mockito.mock;
-
 /**
  * Date: 12/20/15 - 2:04 PM
  *
@@ -70,6 +69,9 @@ public class GiantViewTest {
     assertEquals(1, appender.getLogSize());
   }
 
+  /**
+   * Logging Appender Implementation
+   */
   public class InMemoryAppender extends AppenderBase<ILoggingEvent> {
     private List<ILoggingEvent> log = new LinkedList<>();
 

monad/src/main/java/com/iluwatar/monad/Sex.java

@@ -22,6 +22,9 @@
  */
 package com.iluwatar.monad;
 
+/**
+ * Enumeration of Types of Sex
+ */
 public enum Sex {
   MALE, FEMALE
 }

monad/src/main/java/com/iluwatar/monad/User.java

@@ -22,6 +22,9 @@
  */
 package com.iluwatar.monad;
 
+/**
+ * User Definition
+ */
 public class User {
 
   private String name;

monad/src/test/java/com/iluwatar/monad/AppTest.java

@@ -24,6 +24,9 @@ package com.iluwatar.monad;
 
 import org.junit.Test;
 
+/**
+ * Application Test
+ */
 public class AppTest {
 
   @Test

monad/src/test/java/com/iluwatar/monad/MonadTest.java

@@ -30,6 +30,9 @@ import org.junit.rules.ExpectedException;
 
 import java.util.Objects;
 
+/**
+ * Test for Monad Pattern
+ */
 public class MonadTest {
 
   @Rule

monostate/src/test/java/com/iluwatar/monostate/AppTest.java

@@ -24,6 +24,9 @@ package com.iluwatar.monostate;
 
 import org.junit.Test;
 
+/**
+ * Application Test Entry
+ */
 public class AppTest {
 
   @Test

mute-idiom/src/test/java/com/iluwatar/mute/MuteTest.java

@@ -35,6 +35,9 @@ import org.junit.rules.ExpectedException;
 import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
 
+/**
+ * Test for the mute-idiom pattern
+ */
 public class MuteTest {
 
   private static final Logger LOGGER = LoggerFactory.getLogger(MuteTest.class);

mutex/src/test/java/com/iluwatar/mutex/AppTest.java

@@ -25,6 +25,9 @@ package com.iluwatar.mutex;
 import org.junit.Test;
 import java.io.IOException;
 
+/**
+ * Application Test Entrypoint
+ */
 public class AppTest{
   @Test
   public void test() throws IOException {

naked-objects/dom/src/main/java/domainapp/dom/app/homepage/HomePageService.java

@@ -21,6 +21,10 @@ import org.apache.isis.applib.annotation.HomePage;
 import org.apache.isis.applib.annotation.NatureOfService;
 import org.apache.isis.applib.annotation.SemanticsOf;
 
+/**
+ * HomePage Domain Service
+ * @see HomePageViewModel linked view to HomePage
+ */
 @DomainService(nature = NatureOfService.VIEW_CONTRIBUTIONS_ONLY)
 public class HomePageService {
 

naked-objects/dom/src/main/java/domainapp/dom/app/homepage/HomePageViewModel.java

@@ -21,6 +21,11 @@ import org.apache.isis.applib.annotation.ViewModel;
 import domainapp.dom.modules.simple.SimpleObject;
 import domainapp.dom.modules.simple.SimpleObjects;
 
+/**
+ * Model linked to the HomePage
+ * The underlying layout is specified by json
+ * @see HomePageService - Service Linked to the HomePage
+ */
 @ViewModel
 public class HomePageViewModel {
 

naked-objects/dom/src/main/java/domainapp/dom/modules/simple/SimpleObject.java

@@ -33,6 +33,9 @@ import org.apache.isis.applib.services.eventbus.ActionDomainEvent;
 import org.apache.isis.applib.services.i18n.TranslatableString;
 import org.apache.isis.applib.util.ObjectContracts;
 
+/**
+ * Definition of a Simple Object
+ */
 @javax.jdo.annotations.PersistenceCapable(identityType = IdentityType.DATASTORE, schema = "simple",
     table = "SimpleObject")
 @javax.jdo.annotations.DatastoreIdentity(
@@ -74,6 +77,9 @@ public class SimpleObject implements Comparable<SimpleObject> {
 
   // region > updateName (action)
 
+  /**
+   * Event used to update the Name in the Domain
+   */
   public static class UpdateNameDomainEvent extends ActionDomainEvent<SimpleObject> {
     public UpdateNameDomainEvent(final SimpleObject source, final Identifier identifier,
         final Object... arguments) {

naked-objects/dom/src/main/java/domainapp/dom/modules/simple/SimpleObjects.java

@@ -30,6 +30,9 @@ import org.apache.isis.applib.query.QueryDefault;
 import org.apache.isis.applib.services.eventbus.ActionDomainEvent;
 import org.apache.isis.applib.services.i18n.TranslatableString;
 
+/**
+ * Domain Service for Simple Objects
+ */
 @DomainService(repositoryFor = SimpleObject.class)
 @DomainServiceLayout(menuOrder = "10")
 public class SimpleObjects {
@@ -69,6 +72,9 @@ public class SimpleObjects {
 
   // endregion
 
+  /**
+   * Create Domain Event on SimpleObjects
+   */
   // region > create (action)
   public static class CreateDomainEvent extends ActionDomainEvent<SimpleObjects> {
     public CreateDomainEvent(final SimpleObjects source, final Identifier identifier,

naked-objects/dom/src/test/java/domainapp/dom/modules/simple/SimpleObjectTest.java

@@ -14,11 +14,14 @@
  */
 package domainapp.dom.modules.simple;
 
+import static org.assertj.core.api.Assertions.assertThat;
+
 import org.junit.Before;
 import org.junit.Test;
 
-import static org.assertj.core.api.Assertions.assertThat;
-
+/**
+ * Test for SimpleObject
+ */
 public class SimpleObjectTest {
 
   SimpleObject simpleObject;
@@ -28,6 +31,9 @@ public class SimpleObjectTest {
     simpleObject = new SimpleObject();
   }
 
+  /**
+   * Test for Names for SimpleObjects
+   */
   public static class Name extends SimpleObjectTest {
 
     @Test

naked-objects/dom/src/test/java/domainapp/dom/modules/simple/SimpleObjectsTest.java

@@ -14,10 +14,13 @@
  */
 package domainapp.dom.modules.simple;
 
-import java.util.List;
+import static org.assertj.core.api.Assertions.assertThat;
 
 import com.google.common.collect.Lists;
-
+import java.util.List;
+import org.apache.isis.applib.DomainObjectContainer;
+import org.apache.isis.core.unittestsupport.jmocking.JUnitRuleMockery2;
+import org.apache.isis.core.unittestsupport.jmocking.JUnitRuleMockery2.Mode;
 import org.jmock.Expectations;
 import org.jmock.Sequence;
 import org.jmock.auto.Mock;
@@ -25,12 +28,9 @@ import org.junit.Before;
 import org.junit.Rule;
 import org.junit.Test;
 
-import org.apache.isis.applib.DomainObjectContainer;
-import org.apache.isis.core.unittestsupport.jmocking.JUnitRuleMockery2;
-import org.apache.isis.core.unittestsupport.jmocking.JUnitRuleMockery2.Mode;
-
-import static org.assertj.core.api.Assertions.assertThat;
-
+/**
+ * Test for SimpleObjects
+ */
 public class SimpleObjectsTest {
 
   @Rule
@@ -47,6 +47,9 @@ public class SimpleObjectsTest {
     simpleObjects.container = mockContainer;
   }
 
+  /**
+   * Test Creation of Simple Objects
+   */
   public static class Create extends SimpleObjectsTest {
 
     @Test
@@ -77,6 +80,9 @@ public class SimpleObjectsTest {
 
   }
 
+  /**
+   * Test Listing of Simple Objects
+   */
   public static class ListAll extends SimpleObjectsTest {
 
     @Test

naked-objects/fixture/src/main/java/domainapp/fixture/modules/simple/SimpleObjectCreate.java

@@ -20,6 +20,9 @@ import org.apache.isis.applib.fixturescripts.FixtureScript;
 import domainapp.dom.modules.simple.SimpleObject;
 import domainapp.dom.modules.simple.SimpleObjects;
 
+/**
+ * Fixture to create a simple object
+ */
 public class SimpleObjectCreate extends FixtureScript {
 
   // endregion

naked-objects/fixture/src/main/java/domainapp/fixture/modules/simple/SimpleObjectsTearDown.java

@@ -18,6 +18,9 @@ package domainapp.fixture.modules.simple;
 import org.apache.isis.applib.fixturescripts.FixtureScript;
 import org.apache.isis.applib.services.jdosupport.IsisJdoSupport;
 
+/**
+ * TearDown/Cleanup for SimpleObjects
+ */
 public class SimpleObjectsTearDown extends FixtureScript {
 
   @javax.inject.Inject

naked-objects/fixture/src/main/java/domainapp/fixture/scenarios/RecreateSimpleObjects.java

@@ -27,6 +27,10 @@ import domainapp.dom.modules.simple.SimpleObject;
 import domainapp.fixture.modules.simple.SimpleObjectCreate;
 import domainapp.fixture.modules.simple.SimpleObjectsTearDown;
 
+
+/**
+ * Create a bunch of simple Objects
+ */
 public class RecreateSimpleObjects extends FixtureScript {
 
   public final List<String> names = Collections.unmodifiableList(Arrays.asList("Foo", "Bar", "Baz",

naked-objects/integtests/src/test/java/domainapp/integtests/bootstrap/SimpleAppSystemInitializer.java

@@ -19,6 +19,9 @@ import org.apache.isis.core.integtestsupport.IsisSystemForTest;
 import org.apache.isis.objectstore.jdo.datanucleus.DataNucleusPersistenceMechanismInstaller;
 import org.apache.isis.objectstore.jdo.datanucleus.IsisConfigurationForJdoIntegTests;
 
+/**
+ * Initializer for the Simple App
+ */
 public final class SimpleAppSystemInitializer {
 
   private SimpleAppSystemInitializer() {

naked-objects/integtests/src/test/java/domainapp/integtests/specglue/BootstrappingGlue.java

@@ -21,6 +21,9 @@ import cucumber.api.java.After;
 import cucumber.api.java.Before;
 import domainapp.integtests.bootstrap.SimpleAppSystemInitializer;
 
+/**
+ * BootStrapping IntegrationTesting Before and After Steps
+ */
 public class BootstrappingGlue extends CukeGlueAbstract {
 
   @Before(value = {"@integration"}, order = 100)

naked-objects/integtests/src/test/java/domainapp/integtests/specglue/CatalogOfFixturesGlue.java

@@ -19,6 +19,9 @@ import org.apache.isis.core.specsupport.specs.CukeGlueAbstract;
 import cucumber.api.java.Before;
 import domainapp.fixture.scenarios.RecreateSimpleObjects;
 
+/**
+ * Test Execution to append a fixture of SimpleObjects
+ */
 public class CatalogOfFixturesGlue extends CukeGlueAbstract {
 
   @Before(value = {"@integration", "@SimpleObjectsFixture"}, order = 20000)

naked-objects/integtests/src/test/java/domainapp/integtests/specglue/modules/simple/SimpleObjectGlue.java

@@ -14,18 +14,20 @@
  */
 package domainapp.integtests.specglue.modules.simple;
 
-import java.util.List;
-import java.util.UUID;
-
-import org.apache.isis.core.specsupport.specs.CukeGlueAbstract;
+import static org.hamcrest.CoreMatchers.is;
+import static org.junit.Assert.assertThat;
 
 import cucumber.api.java.en.Given;
 import cucumber.api.java.en.When;
 import domainapp.dom.modules.simple.SimpleObject;
 import domainapp.dom.modules.simple.SimpleObjects;
-import static org.hamcrest.CoreMatchers.is;
-import static org.junit.Assert.assertThat;
+import java.util.List;
+import java.util.UUID;
+import org.apache.isis.core.specsupport.specs.CukeGlueAbstract;
 
+/**
+ * Test Simple Object Operations
+ */
 public class SimpleObjectGlue extends CukeGlueAbstract {
 
   @Given("^there are.* (\\d+) simple objects$")

naked-objects/integtests/src/test/java/domainapp/integtests/tests/SimpleAppIntegTest.java

@@ -25,6 +25,9 @@ import org.apache.isis.core.integtestsupport.scenarios.ScenarioExecutionForInteg
 
 import domainapp.integtests.bootstrap.SimpleAppSystemInitializer;
 
+/**
+ * SimpleApp Integration Tests will implement this Abstract Class.
+ */
 public abstract class SimpleAppIntegTest extends IntegrationTestAbstract {
 
   @BeforeClass
@@ -35,5 +38,4 @@ public abstract class SimpleAppIntegTest extends IntegrationTestAbstract {
     // instantiating will install onto ThreadLocal
     new ScenarioExecutionForIntegration();
   }
-
 }

naked-objects/integtests/src/test/java/domainapp/integtests/tests/modules/simple/SimpleObjectIntegTest.java

@@ -18,21 +18,22 @@
  */
 package domainapp.integtests.tests.modules.simple;
 
-import javax.inject.Inject;
-
-import org.junit.Before;
-import org.junit.Test;
-
-import org.apache.isis.applib.DomainObjectContainer;
-import org.apache.isis.applib.fixturescripts.FixtureScripts;
-import org.apache.isis.applib.services.wrapper.DisabledException;
-import org.apache.isis.applib.services.wrapper.InvalidException;
+import static org.assertj.core.api.Assertions.assertThat;
 
 import domainapp.dom.modules.simple.SimpleObject;
 import domainapp.fixture.scenarios.RecreateSimpleObjects;
 import domainapp.integtests.tests.SimpleAppIntegTest;
-import static org.assertj.core.api.Assertions.assertThat;
+import javax.inject.Inject;
+import org.apache.isis.applib.DomainObjectContainer;
+import org.apache.isis.applib.fixturescripts.FixtureScripts;
+import org.apache.isis.applib.services.wrapper.DisabledException;
+import org.apache.isis.applib.services.wrapper.InvalidException;
+import org.junit.Before;
+import org.junit.Test;
 
+/**
+ * Test Fixtures with Simple Objects
+ */
 public class SimpleObjectIntegTest extends SimpleAppIntegTest {
 
   @Inject
@@ -54,6 +55,9 @@ public class SimpleObjectIntegTest extends SimpleAppIntegTest {
     simpleObjectWrapped = wrap(simpleObjectPojo);
   }
 
+  /**
+   * Test Object Name accessibility
+   */
   public static class Name extends SimpleObjectIntegTest {
 
     @Test
@@ -75,6 +79,9 @@ public class SimpleObjectIntegTest extends SimpleAppIntegTest {
     }
   }
 
+  /**
+   * Test Validation of SimpleObject Names
+   */
   public static class UpdateName extends SimpleObjectIntegTest {
 
     @Test
@@ -99,6 +106,9 @@ public class SimpleObjectIntegTest extends SimpleAppIntegTest {
     }
   }
 
+  /**
+   * Test ContainerTitle generation based on SimpleObject Name
+   */
   public static class Title extends SimpleObjectIntegTest {
 
     @Inject

naked-objects/integtests/src/test/java/domainapp/integtests/tests/modules/simple/SimpleObjectsIntegTest.java

@@ -18,28 +18,27 @@
  */
 package domainapp.integtests.tests.modules.simple;
 
-import java.sql.SQLIntegrityConstraintViolationException;
-import java.util.List;
-
-import javax.inject.Inject;
+import static org.assertj.core.api.Assertions.assertThat;
 
 import com.google.common.base.Throwables;
-
-import org.hamcrest.Description;
-import org.hamcrest.Matcher;
-import org.hamcrest.TypeSafeMatcher;
-import org.junit.Test;
-
-import org.apache.isis.applib.fixturescripts.FixtureScript;
-import org.apache.isis.applib.fixturescripts.FixtureScripts;
-
 import domainapp.dom.modules.simple.SimpleObject;
 import domainapp.dom.modules.simple.SimpleObjects;
 import domainapp.fixture.modules.simple.SimpleObjectsTearDown;
 import domainapp.fixture.scenarios.RecreateSimpleObjects;
 import domainapp.integtests.tests.SimpleAppIntegTest;
-import static org.assertj.core.api.Assertions.assertThat;
+import java.sql.SQLIntegrityConstraintViolationException;
+import java.util.List;
+import javax.inject.Inject;
+import org.apache.isis.applib.fixturescripts.FixtureScript;
+import org.apache.isis.applib.fixturescripts.FixtureScripts;
+import org.hamcrest.Description;
+import org.hamcrest.Matcher;
+import org.hamcrest.TypeSafeMatcher;
+import org.junit.Test;
 
+/**
+ * Fixture Pattern Integration Test
+ */
 public class SimpleObjectsIntegTest extends SimpleAppIntegTest {
 
   @Inject
@@ -47,6 +46,9 @@ public class SimpleObjectsIntegTest extends SimpleAppIntegTest {
   @Inject
   SimpleObjects simpleObjects;
 
+  /**
+   * Test Listing of All Simple Objects
+   */
   public static class ListAll extends SimpleObjectsIntegTest {
 
     @Test
@@ -83,6 +85,10 @@ public class SimpleObjectsIntegTest extends SimpleAppIntegTest {
     }
   }
 
+
+  /**
+   * Test Creation of Simple Objects
+   */
   public static class Create extends SimpleObjectsIntegTest {
 
     @Test

object-mother/src/main/java/com/iluwatar/objectmother/King.java

@@ -22,6 +22,9 @@
  */
 package com.iluwatar.objectmother;
 
+/**
+ * Defines all attributes and behaviour related to the King
+ */
 public class King implements Royalty {
   boolean isDrunk = false;
   boolean isHappy = false;

object-mother/src/main/java/com/iluwatar/objectmother/Queen.java

@@ -22,6 +22,9 @@
  */
 package com.iluwatar.objectmother;
 
+/**
+ * Defines all attributes and behaviour related to the Queen
+ */
 public class Queen implements Royalty {
   private boolean isDrunk = false;
   private boolean isHappy = false;

object-mother/src/main/java/com/iluwatar/objectmother/Royalty.java

@@ -22,6 +22,9 @@
  */
 package com.iluwatar.objectmother;
 
+/**
+ * Interface contracting Royalty Behaviour
+ */
 public interface Royalty {
   void makeDrunk();
 

object-mother/src/main/java/com/iluwatar/objectmother/RoyaltyObjectMother.java

@@ -22,6 +22,9 @@
  */
 package com.iluwatar.objectmother;
 
+/**
+ * Object Mother Pattern generating Royalty Types
+ */
 public final class RoyaltyObjectMother {
 
   /**

object-mother/src/test/java/com/iluwatar/objectmother/test/RoyaltyObjectMotherTest.java

@@ -33,6 +33,9 @@ import com.iluwatar.objectmother.Queen;
 import com.iluwatar.objectmother.Royalty;
 import com.iluwatar.objectmother.RoyaltyObjectMother;
 
+/**
+ * Test Generation of Royalty Types using the object-mother
+ */
 public class RoyaltyObjectMotherTest {
 
   @Test

object-pool/src/main/java/com/iluwatar/object/pool/ObjectPool.java

@@ -26,8 +26,8 @@ import java.util.HashSet;
 import java.util.Set;
 
 /**
- * 
  * Generic object pool
+ * @param <T> Type T of Object in the Pool
  */
 public abstract class ObjectPool<T> {
 

observer/src/main/java/com/iluwatar/observer/generic/Observer.java

@@ -23,8 +23,10 @@
 package com.iluwatar.observer.generic;
 
 /**
- * 
  * Observer
+ * @param <S> Observable
+ * @param <O> Observer
+ * @param <A> Action
  */
 public interface Observer<S extends Observable<S, O, A>, O extends Observer<S, O, A>, A> {
 

observer/src/test/java/com/iluwatar/observer/WeatherObserverTest.java

@@ -22,18 +22,18 @@
  */
 package com.iluwatar.observer;
 
+import static org.junit.Assert.assertEquals;
+
 import com.iluwatar.observer.utils.InMemoryAppender;
+import java.util.function.Supplier;
 import org.junit.After;
 import org.junit.Before;
 import org.junit.Test;
 
-import java.util.function.Supplier;
-
-import static org.junit.Assert.assertEquals;
-
 /**
  * Date: 12/27/15 - 11:44 AM
- *
+ * Weather Observer Tests
+ * @param <O> Type of WeatherObserver
  * @author Jeroen Meulemeester
  */
 public abstract class WeatherObserverTest<O extends WeatherObserver> {

observer/src/test/java/com/iluwatar/observer/generic/ObserverTest.java

@@ -22,19 +22,19 @@
  */
 package com.iluwatar.observer.generic;
 
+import static org.junit.Assert.assertEquals;
+
 import com.iluwatar.observer.WeatherType;
 import com.iluwatar.observer.utils.InMemoryAppender;
+import java.util.function.Supplier;
 import org.junit.After;
 import org.junit.Before;
 import org.junit.Test;
 
-import java.util.function.Supplier;
-
-import static org.junit.Assert.assertEquals;
-
 /**
  * Date: 12/27/15 - 11:44 AM
- *
+ * Test for Observers
+ * @param <O> Type of Observer
  * @author Jeroen Meulemeester
  */
 public abstract class ObserverTest<O extends Observer> {

observer/src/test/java/com/iluwatar/observer/utils/InMemoryAppender.java

@@ -30,6 +30,9 @@ import org.slf4j.LoggerFactory;
 import java.util.LinkedList;
 import java.util.List;
 
+/**
+ * InMemory Log Appender Util.
+ */
 public class InMemoryAppender extends AppenderBase<ILoggingEvent> {
   private List<ILoggingEvent> log = new LinkedList<>();
 

page-object/src/test/java/com/iluwatar/pageobject/AlbumListPageTest.java

@@ -23,15 +23,17 @@
 package com.iluwatar.pageobject;
 
 
+import static org.junit.Assert.assertTrue;
+
 import com.gargoylesoftware.htmlunit.WebClient;
 import com.iluwatar.pageobject.pages.AlbumListPage;
 import com.iluwatar.pageobject.pages.AlbumPage;
 import org.junit.Before;
 import org.junit.Test;
 
-import static org.junit.Assert.assertTrue;
-
-
+/**
+ * Test Album Selection and Album Listing
+ */
 public class AlbumListPageTest {
 
   private AlbumListPage albumListPage = new AlbumListPage(new WebClient());

page-object/src/test/java/com/iluwatar/pageobject/AlbumPageTest.java

@@ -22,14 +22,17 @@
  */
 package com.iluwatar.pageobject;
 
+import static org.junit.Assert.assertTrue;
+
 import com.gargoylesoftware.htmlunit.WebClient;
 import com.iluwatar.pageobject.pages.AlbumListPage;
 import com.iluwatar.pageobject.pages.AlbumPage;
 import org.junit.Before;
 import org.junit.Test;
 
-import static org.junit.Assert.assertTrue;
-
+/**
+ * Test Album Page Operations
+ */
 public class AlbumPageTest {
 
   private AlbumPage albumPage = new AlbumPage(new WebClient());

page-object/src/test/java/com/iluwatar/pageobject/LoginPageTest.java

@@ -22,14 +22,17 @@
  */
 package com.iluwatar.pageobject;
 
+import static org.junit.Assert.assertTrue;
+
 import com.gargoylesoftware.htmlunit.WebClient;
 import com.iluwatar.pageobject.pages.AlbumListPage;
 import com.iluwatar.pageobject.pages.LoginPage;
 import org.junit.Before;
 import org.junit.Test;
 
-import static org.junit.Assert.assertTrue;
-
+/**
+ * Test Login Page Object
+ */
 public class LoginPageTest {
 
   private LoginPage loginPage = new LoginPage(new WebClient());

poison-pill/src/main/java/com/iluwatar/poison/pill/Message.java

@@ -63,6 +63,9 @@ public interface Message {
 
   };
 
+  /**
+   * Enumeration of Type of Headers
+   */
   public enum Headers {
     DATE, SENDER
   }

private-class-data/src/test/java/com/iluwatar/privateclassdata/utils/InMemoryAppender.java

@@ -30,6 +30,9 @@ import org.slf4j.LoggerFactory;
 import java.util.LinkedList;
 import java.util.List;
 
+/**
+ * InMemory Log Appender Util.
+ */
 public class InMemoryAppender extends AppenderBase<ILoggingEvent> {
   private List<ILoggingEvent> log = new LinkedList<>();
 

promise/src/main/java/com/iluwatar/promise/Utility.java

@@ -39,6 +39,9 @@ import java.util.Iterator;
 import java.util.Map;
 import java.util.Map.Entry;
 
+/**
+ * Utility to perform various operations
+ */
 public class Utility {
 
   private static final Logger LOGGER = LoggerFactory.getLogger(Utility.class);

property/src/main/java/com/iluwatar/property/Character.java

@@ -30,6 +30,9 @@ import java.util.Map;
  */
 public class Character implements Prototype {
 
+  /**
+   * Enumeration of Character types
+   */
   public enum Type {
     WARRIOR, MAGE, ROGUE
   }

prototype/src/test/java/com/iluwatar/prototype/PrototypeTest.java

@@ -22,21 +22,20 @@
  */
 package com.iluwatar.prototype;
 
-import org.junit.Test;
-import org.junit.runner.RunWith;
-import org.junit.runners.Parameterized;
-
-import java.util.Arrays;
-import java.util.Collection;
-
 import static org.junit.Assert.assertEquals;
 import static org.junit.Assert.assertNotNull;
 import static org.junit.Assert.assertNotSame;
 import static org.junit.Assert.assertSame;
 
+import java.util.Arrays;
+import java.util.Collection;
+import org.junit.Test;
+import org.junit.runner.RunWith;
+import org.junit.runners.Parameterized;
+
 /**
  * Date: 12/28/15 - 8:45 PM
- *
+ * @param <P> Prototype
  * @author Jeroen Meulemeester
  */
 @RunWith(Parameterized.class)

proxy/src/test/java/com/iluwatar/proxy/utils/InMemoryAppender.java

@@ -30,6 +30,10 @@ import org.slf4j.LoggerFactory;
 import java.util.LinkedList;
 import java.util.List;
 
+
+/**
+ * InMemory Log Appender Util.
+ */
 public class InMemoryAppender extends AppenderBase<ILoggingEvent> {
   private List<ILoggingEvent> log = new LinkedList<>();
 

reader-writer-lock/src/test/java/com/iluwatar/reader/writer/lock/utils/InMemoryAppender.java

@@ -30,6 +30,9 @@ import org.slf4j.LoggerFactory;
 import java.util.LinkedList;
 import java.util.List;
 
+/**
+ * InMemory Log Appender Util.
+ */
 public class InMemoryAppender extends AppenderBase<ILoggingEvent> {
   private List<ILoggingEvent> log = new LinkedList<>();
 

repository/src/main/java/com/iluwatar/repository/PersonSpecifications.java

@@ -34,6 +34,9 @@ import org.springframework.data.jpa.domain.Specification;
  */
 public class PersonSpecifications {
 
+  /**
+   * Specifications stating the Between (From - To) Age Specification
+   */
   public static class AgeBetweenSpec implements Specification<Person> {
 
     private int from;

resource-acquisition-is-initialization/src/test/java/com/iluwatar/resource/acquisition/is/initialization/ClosableTest.java

@@ -22,19 +22,18 @@
  */
 package com.iluwatar.resource.acquisition.is.initialization;
 
+import static org.junit.Assert.assertTrue;
+
 import ch.qos.logback.classic.Logger;
 import ch.qos.logback.classic.spi.ILoggingEvent;
 import ch.qos.logback.core.AppenderBase;
+import java.util.LinkedList;
+import java.util.List;
 import org.junit.After;
 import org.junit.Before;
 import org.junit.Test;
 import org.slf4j.LoggerFactory;
 
-import java.util.LinkedList;
-import java.util.List;
-
-import static org.junit.Assert.assertTrue;
-
 /**
  * Date: 12/28/15 - 9:31 PM
  *
@@ -64,6 +63,9 @@ public class ClosableTest {
     assertTrue(appender.logContains("Sliding door closes."));
   }
 
+  /**
+   * Logging Appender Implementation
+   */
   public class InMemoryAppender extends AppenderBase<ILoggingEvent> {
     private List<ILoggingEvent> log = new LinkedList<>();
 

semaphore/src/main/java/com/iluwatar/semaphore/Fruit.java

@@ -27,6 +27,9 @@ package com.iluwatar.semaphore;
  */
 public class Fruit {
 
+  /**
+   * Enumeration of Fruit Types
+   */
   public static enum FruitType {
     ORANGE, APPLE, LEMON
   }

semaphore/src/test/java/com/iluwatar/semaphore/AppTest.java

@@ -25,6 +25,9 @@ package com.iluwatar.semaphore;
 import org.junit.Test;
 import java.io.IOException;
 
+/**
+ * Application Test Entrypoint
+ */
 public class AppTest{
   @Test
   public void test() throws IOException {

service-layer/src/test/java/com/iluwatar/servicelayer/common/BaseDaoTest.java

@@ -22,23 +22,23 @@
  */
 package com.iluwatar.servicelayer.common;
 
-import com.iluwatar.servicelayer.hibernate.HibernateUtil;
-
-import org.junit.After;
-import org.junit.Before;
-import org.junit.Test;
-
-import java.util.List;
-import java.util.concurrent.atomic.AtomicInteger;
-import java.util.function.Function;
-
 import static org.junit.Assert.assertEquals;
 import static org.junit.Assert.assertNotNull;
 import static org.junit.Assert.assertNull;
 
+import com.iluwatar.servicelayer.hibernate.HibernateUtil;
+import java.util.List;
+import java.util.concurrent.atomic.AtomicInteger;
+import java.util.function.Function;
+import org.junit.After;
+import org.junit.Before;
+import org.junit.Test;
+
 /**
  * Date: 12/28/15 - 10:53 PM
- *
+ * Test for Base Data Access Objects
+ * @param <E> Type of Base Entity
+ * @param <D> Type of Dao Base Implementation
  * @author Jeroen Meulemeester
  */
 public abstract class BaseDaoTest<E extends BaseEntity, D extends DaoBaseImpl<E>> {

singleton/src/test/java/com/iluwatar/singleton/SingletonTest.java

@@ -22,7 +22,8 @@
  */
 package com.iluwatar.singleton;
 
-import org.junit.Test;
+import static org.junit.Assert.assertNotNull;
+import static org.junit.Assert.assertSame;
 
 import java.util.ArrayList;
 import java.util.List;
@@ -31,9 +32,7 @@ import java.util.concurrent.ExecutorService;
 import java.util.concurrent.Executors;
 import java.util.concurrent.Future;
 import java.util.function.Supplier;
-
-import static org.junit.Assert.assertNotNull;
-import static org.junit.Assert.assertSame;
+import org.junit.Test;
 
 /**
  * This class provides several test case that test singleton construction.
@@ -43,7 +42,7 @@ import static org.junit.Assert.assertSame;
  * the same when called in the DIFFERENT thread.
  *
  * Date: 12/29/15 - 19:25 PM
- *
+ * @param <S> Supplier method generating singletons
  * @author Jeroen Meulemeester
  * @author Richard Jones
  */

template-method/src/test/java/com/iluwatar/templatemethod/StealingMethodTest.java

@@ -22,23 +22,22 @@
  */
 package com.iluwatar.templatemethod;
 
+import static org.junit.Assert.assertEquals;
+import static org.junit.Assert.assertTrue;
+
 import ch.qos.logback.classic.Logger;
 import ch.qos.logback.classic.spi.ILoggingEvent;
 import ch.qos.logback.core.AppenderBase;
+import java.util.LinkedList;
+import java.util.List;
 import org.junit.After;
 import org.junit.Before;
 import org.junit.Test;
 import org.slf4j.LoggerFactory;
 
-import java.util.LinkedList;
-import java.util.List;
-
-import static org.junit.Assert.assertEquals;
-import static org.junit.Assert.assertTrue;
-
 /**
  * Date: 12/30/15 - 18:12 PM
- *
+ * @param <M> Type of StealingMethod
  * @author Jeroen Meulemeester
  */
 public abstract class StealingMethodTest<M extends StealingMethod> {

thread-pool/src/test/java/com/iluwatar/threadpool/TaskTest.java

@@ -22,7 +22,8 @@
  */
 package com.iluwatar.threadpool;
 
-import org.junit.Test;
+import static org.junit.Assert.assertEquals;
+import static org.junit.Assert.assertNotNull;
 
 import java.util.ArrayList;
 import java.util.List;
@@ -34,13 +35,12 @@ import java.util.concurrent.Executors;
 import java.util.concurrent.Future;
 import java.util.function.Function;
 import java.util.stream.Collectors;
-
-import static org.junit.Assert.assertEquals;
-import static org.junit.Assert.assertNotNull;
+import org.junit.Test;
 
 /**
  * Date: 12/30/15 - 18:22 PM
- *
+ * Test for Tasks using a Thread Pool
+ * @param <T> Type of Task
  * @author Jeroen Meulemeester
  */
 public abstract class TaskTest<T extends Task> {