Resolves checkstyle errors for business-delegate, bytecode, caching (#1059)

* Reduces checkstyle errors in business-delegate

* Reduces checkstyle errors in bytecode

* Reduces checkstyle errors in caching

business-delegate/src/main/java/com/iluwatar/business/delegate/BusinessDelegate.java

@@ -24,7 +24,7 @@
 package com.iluwatar.business.delegate;
 
 /**
- * BusinessDelegate separates the presentation and business tiers
+ * BusinessDelegate separates the presentation and business tiers.
  */
 public class BusinessDelegate {
 

business-delegate/src/main/java/com/iluwatar/business/delegate/BusinessLookup.java

@@ -33,6 +33,8 @@ public class BusinessLookup {
   private JmsService jmsService;
 
   /**
+   * Gets service instance based on service type.
+   *
    * @param serviceType Type of service instance to be returned.
    * @return Service instance.
    */

business-delegate/src/main/java/com/iluwatar/business/delegate/BusinessService.java

@@ -24,9 +24,7 @@
 package com.iluwatar.business.delegate;
 
 /**
- * 
+ * Interface for service implementations.
- * Interface for service implementations
- *
  */
 public interface BusinessService {
 

business-delegate/src/main/java/com/iluwatar/business/delegate/Client.java

@@ -24,9 +24,7 @@
 package com.iluwatar.business.delegate;
 
 /**
- * 
+ * Client utilizes BusinessDelegate to call the business tier.
- * Client utilizes BusinessDelegate to call the business tier
- *
  */
 public class Client {
 

business-delegate/src/main/java/com/iluwatar/business/delegate/EjbService.java

@@ -27,9 +27,7 @@ import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
 
 /**
- * 
+ * Service EJB implementation.
- * Service EJB implementation
- *
  */
 public class EjbService implements BusinessService {
 

business-delegate/src/main/java/com/iluwatar/business/delegate/JmsService.java

@@ -27,9 +27,7 @@ import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
 
 /**
- * 
+ * Service JMS implementation.
- * Service JMS implementation
- *
  */
 public class JmsService implements BusinessService {
 

business-delegate/src/main/java/com/iluwatar/business/delegate/ServiceType.java

@@ -24,9 +24,7 @@
 package com.iluwatar.business.delegate;
 
 /**
- * 
+ * Enumeration for service types.
- * Enumeration for service types
- *
  */
 public enum ServiceType {
 

bytecode/src/main/java/com/iluwatar/bytecode/App.java

@@ -24,57 +24,59 @@
 package com.iluwatar.bytecode;
 
 import com.iluwatar.bytecode.util.InstructionConverterUtil;
+import java.util.Stack;
 import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
 
 /**
- * The intention of Bytecode pattern is to give behavior the flexibility of data by encoding it as instructions
+ * The intention of Bytecode pattern is to give behavior the flexibility of data by encoding it as
- * for a virtual machine.
+ * instructions for a virtual machine. An instruction set defines the low-level operations that can
- * An instruction set defines the low-level operations that can be performed. A series of instructions is encoded as
+ * be performed. A series of instructions is encoded as a sequence of bytes. A virtual machine
- * a sequence of bytes. A virtual machine executes these instructions one at a time,
+ * executes these instructions one at a time, using a stack for intermediate values. By combining
- * using a stack for intermediate values. By combining instructions, complex high-level behavior can be defined.
+ * instructions, complex high-level behavior can be defined.
- *
- * This pattern should be used when there is a need to define high number of behaviours and implementation engine
- * is not a good choice because
- * It is too lowe level
- * Iterating on it takes too long due to slow compile times or other tooling issues.
- * It has too much trust. If you want to ensure the behavior being defined can’t break the game,
- * you need to sandbox it from the rest of the codebase.
  *
+ * <p>This pattern should be used when there is a need to define high number of behaviours and
+ * implementation engine is not a good choice because It is too lowe level Iterating on it takes too
+ * long due to slow compile times or other tooling issues. It has too much trust. If you want to
+ * ensure the behavior being defined can’t break the game, you need to sandbox it from the rest of
+ * the codebase.
  */
 public class App {
   private static final Logger LOGGER = LoggerFactory.getLogger(App.class);
 
   /**
-   * Main app method
+   * Main app method.
+   *
    * @param args command line args
    */
   public static void main(String[] args) {
-    VirtualMachine vm = new VirtualMachine();
 
     Wizard wizard = new Wizard();
     wizard.setHealth(45);
     wizard.setAgility(7);
     wizard.setWisdom(11);
+
+    VirtualMachine vm = new VirtualMachine();
     vm.getWizards()[0] = wizard;
 
     interpretInstruction("LITERAL 0", vm);
-    interpretInstruction( "LITERAL 0", vm);
+    interpretInstruction("LITERAL 0", vm);
-    interpretInstruction( "GET_HEALTH", vm);
+    interpretInstruction("GET_HEALTH", vm);
-    interpretInstruction( "LITERAL 0", vm);
+    interpretInstruction("LITERAL 0", vm);
-    interpretInstruction( "GET_AGILITY", vm);
+    interpretInstruction("GET_AGILITY", vm);
-    interpretInstruction( "LITERAL 0", vm);
+    interpretInstruction("LITERAL 0", vm);
-    interpretInstruction( "GET_WISDOM ", vm);
+    interpretInstruction("GET_WISDOM ", vm);
-    interpretInstruction( "ADD", vm);
+    interpretInstruction("ADD", vm);
-    interpretInstruction( "LITERAL 2", vm);
+    interpretInstruction("LITERAL 2", vm);
-    interpretInstruction( "DIVIDE", vm);
+    interpretInstruction("DIVIDE", vm);
-    interpretInstruction( "ADD", vm);
+    interpretInstruction("ADD", vm);
-    interpretInstruction( "SET_HEALTH", vm);
+    interpretInstruction("SET_HEALTH", vm);
   }
 
   private static void interpretInstruction(String instruction, VirtualMachine vm) {
     InstructionConverterUtil converter = new InstructionConverterUtil();
     vm.execute(converter.convertToByteCode(instruction));
-    LOGGER.info(instruction + String.format("%" + (12 - instruction.length()) + "s", "" ) + vm.getStack());
+    Stack<Integer> stack = vm.getStack();
+    LOGGER.info(instruction + String.format("%" + (12 - instruction.length()) + "s", "") + stack);
   }
 }

bytecode/src/main/java/com/iluwatar/bytecode/Instruction.java

@@ -24,7 +24,7 @@
 package com.iluwatar.bytecode;
 
 /**
- * Representation of instructions understandable by virtual machine
+ * Representation of instructions understandable by virtual machine.
  */
 public enum Instruction {
 
@@ -51,7 +51,8 @@ public enum Instruction {
   }
 
   /**
-   * Converts integer value to Instruction
+   * Converts integer value to Instruction.
+   *
    * @param value value of instruction
    * @return representation of the instruction
    */

bytecode/src/main/java/com/iluwatar/bytecode/VirtualMachine.java

@@ -26,7 +26,7 @@ package com.iluwatar.bytecode;
 import java.util.Stack;
 
 /**
- * Implementation of virtual machine
+ * Implementation of virtual machine.
  */
 public class VirtualMachine {
 
@@ -35,7 +35,7 @@ public class VirtualMachine {
   private Wizard[] wizards = new Wizard[2];
 
   /**
-   * Constructor
+   * Constructor.
    */
   public VirtualMachine() {
     for (int i = 0; i < wizards.length; i++) {
@@ -44,7 +44,8 @@ public class VirtualMachine {
   }
 
   /**
-   * Executes provided bytecode
+   * Executes provided bytecode.
+   *
    * @param bytecode to execute
    */
   public void execute(int[] bytecode) {

bytecode/src/main/java/com/iluwatar/bytecode/Wizard.java

@@ -27,7 +27,8 @@ import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
 
 /**
- * This class represent game objects which properties can be changed by instructions interpreted by virtual machine
+ * This class represent game objects which properties can be changed by instructions interpreted by
+ * virtual machine.
  */
 public class Wizard {
   private static final Logger LOGGER = LoggerFactory.getLogger(Wizard.class);

bytecode/src/main/java/com/iluwatar/bytecode/util/InstructionConverterUtil.java

@@ -26,11 +26,11 @@ package com.iluwatar.bytecode.util;
 import com.iluwatar.bytecode.Instruction;
 
 /**
- * Utility class used for instruction validation and conversion
+ * Utility class used for instruction validation and conversion.
  */
 public class InstructionConverterUtil {
   /**
-   * Converts instructions represented as String
+   * Converts instructions represented as String.
    *
    * @param instructions to convert
    * @return array of int representing bytecode
@@ -48,7 +48,8 @@ public class InstructionConverterUtil {
       } else if (isValidInt(splitedInstructions[i])) {
         bytecode[i] = Integer.valueOf(splitedInstructions[i]);
       } else {
-        throw new IllegalArgumentException("Invalid instruction or number: " + splitedInstructions[i]);
+        String errorMessage = "Invalid instruction or number: " + splitedInstructions[i];
+        throw new IllegalArgumentException(errorMessage);
       }
     }
 

caching/src/main/java/com/iluwatar/caching/App.java

@@ -27,7 +27,6 @@ import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
 
 /**
- *
  * The Caching pattern describes how to avoid expensive re-acquisition of resources by not releasing
  * the resources immediately after their use. The resources retain their identity, are kept in some
  * fast-access storage, and are re-used to avoid having to acquire them again. There are four main
@@ -43,8 +42,8 @@ import org.slf4j.LoggerFactory;
  * should be written back to the backing store (i.e. Database) and help keep both data sources
  * synchronized/up-to-date. This pattern can improve performance and also helps to maintain
  * consistency between data held in the cache and the data in the underlying data store.
- * <p>
+ *
- * In this example, the user account ({@link UserAccount}) entity is used as the underlying
+ * <p>In this example, the user account ({@link UserAccount}) entity is used as the underlying
  * application data. The cache itself is implemented as an internal (Java) data structure. It adopts
  * a Least-Recently-Used (LRU) strategy for evicting data from itself when its full. The four
  * strategies are individually tested. The testing of the cache is restricted towards saving and
@@ -60,7 +59,6 @@ import org.slf4j.LoggerFactory;
  * @see CacheStore
  * @see LruCache
  * @see CachingPolicy
- *
  */
 public class App {
 
@@ -68,15 +66,15 @@ public class App {
 
 
   /**
-   * Program entry point
+   * Program entry point.
    *
    * @param args command line args
    */
   public static void main(String[] args) {
     AppManager.initDb(false); // VirtualDB (instead of MongoDB) was used in running the JUnit tests
-                              // and the App class to avoid Maven compilation errors. Set flag to
+    // and the App class to avoid Maven compilation errors. Set flag to
-                              // true to run the tests with MongoDB (provided that MongoDB is
+    // true to run the tests with MongoDB (provided that MongoDB is
-                              // installed and socket connection is open).
+    // installed and socket connection is open).
     AppManager.initCacheCapacity(3);
     App app = new App();
     app.useReadAndWriteThroughStrategy();
@@ -86,7 +84,7 @@ public class App {
   }
 
   /**
-   * Read-through and write-through
+   * Read-through and write-through.
    */
   public void useReadAndWriteThroughStrategy() {
     LOGGER.info("# CachingPolicy.THROUGH");
@@ -101,7 +99,7 @@ public class App {
   }
 
   /**
-   * Read-through and write-around
+   * Read-through and write-around.
    */
   public void useReadThroughAndWriteAroundStrategy() {
     LOGGER.info("# CachingPolicy.AROUND");
@@ -123,7 +121,7 @@ public class App {
   }
 
   /**
-   * Read-through and write-behind
+   * Read-through and write-behind.
    */
   public void useReadThroughAndWriteBehindStrategy() {
     LOGGER.info("# CachingPolicy.BEHIND");
@@ -147,7 +145,7 @@ public class App {
   }
 
   /**
-   * Cache-Aside
+   * Cache-Aside.
    */
   public void useCacheAsideStategy() {
     LOGGER.info("# CachingPolicy.ASIDE");

caching/src/main/java/com/iluwatar/caching/AppManager.java

@@ -26,13 +26,11 @@ package com.iluwatar.caching;
 import java.text.ParseException;
 
 /**
- *
  * AppManager helps to bridge the gap in communication between the main class and the application's
  * back-end. DB connection is initialized through this class. The chosen caching strategy/policy is
  * also initialized here. Before the cache can be used, the size of the cache has to be set.
  * Depending on the chosen caching policy, AppManager will call the appropriate function in the
  * CacheStore class.
- *
  */
 public final class AppManager {
 
@@ -42,7 +40,6 @@ public final class AppManager {
   }
 
   /**
-   *
    * Developer/Tester is able to choose whether the application should use MongoDB as its underlying
    * data storage or a simple Java data structure to (temporarily) store the data/objects during
    * runtime.
@@ -60,7 +57,7 @@ public final class AppManager {
   }
 
   /**
-   * Initialize caching policy
+   * Initialize caching policy.
    */
   public static void initCachingPolicy(CachingPolicy policy) {
     cachingPolicy = policy;
@@ -75,7 +72,7 @@ public final class AppManager {
   }
 
   /**
-   * Find user account
+   * Find user account.
    */
   public static UserAccount find(String userId) {
     if (cachingPolicy == CachingPolicy.THROUGH || cachingPolicy == CachingPolicy.AROUND) {
@@ -89,7 +86,7 @@ public final class AppManager {
   }
 
   /**
-   * Save user account
+   * Save user account.
    */
   public static void save(UserAccount userAccount) {
     if (cachingPolicy == CachingPolicy.THROUGH) {
@@ -108,7 +105,7 @@ public final class AppManager {
   }
 
   /**
-   * Cache-Aside save user account helper
+   * Cache-Aside save user account helper.
    */
   private static void saveAside(UserAccount userAccount) {
     DbManager.updateDb(userAccount);
@@ -116,7 +113,7 @@ public final class AppManager {
   }
 
   /**
-   * Cache-Aside find user account helper
+   * Cache-Aside find user account helper.
    */
   private static UserAccount findAside(String userId) {
     UserAccount userAccount = CacheStore.get(userId);

caching/src/main/java/com/iluwatar/caching/CacheStore.java

@@ -23,15 +23,12 @@
 
 package com.iluwatar.caching;
 
+import java.util.List;
 import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
 
-import java.util.List;
-
 /**
- *
  * The caching strategies are implemented in this class.
- *
  */
 public class CacheStore {
 
@@ -43,7 +40,7 @@ public class CacheStore {
   }
 
   /**
-   * Init cache capacity
+   * Init cache capacity.
    */
   public static void initCapacity(int capacity) {
     if (cache == null) {
@@ -54,7 +51,7 @@ public class CacheStore {
   }
 
   /**
-   * Get user account using read-through cache
+   * Get user account using read-through cache.
    */
   public static UserAccount readThrough(String userId) {
     if (cache.contains(userId)) {
@@ -68,7 +65,7 @@ public class CacheStore {
   }
 
   /**
-   * Get user account using write-through cache
+   * Get user account using write-through cache.
    */
   public static void writeThrough(UserAccount userAccount) {
     if (cache.contains(userAccount.getUserId())) {
@@ -80,20 +77,20 @@ public class CacheStore {
   }
 
   /**
-   * Get user account using write-around cache
+   * Get user account using write-around cache.
    */
   public static void writeAround(UserAccount userAccount) {
     if (cache.contains(userAccount.getUserId())) {
       DbManager.updateDb(userAccount);
       cache.invalidate(userAccount.getUserId()); // Cache data has been updated -- remove older
-                                                 // version from cache.
+      // version from cache.
     } else {
       DbManager.writeToDb(userAccount);
     }
   }
 
   /**
-   * Get user account using read-through cache with write-back policy
+   * Get user account using read-through cache with write-back policy.
    */
   public static UserAccount readThroughWithWriteBackPolicy(String userId) {
     if (cache.contains(userId)) {
@@ -112,7 +109,7 @@ public class CacheStore {
   }
 
   /**
-   * Set user account
+   * Set user account.
    */
   public static void writeBehind(UserAccount userAccount) {
     if (cache.isFull() && !cache.contains(userAccount.getUserId())) {
@@ -124,7 +121,7 @@ public class CacheStore {
   }
 
   /**
-   * Clears cache
+   * Clears cache.
    */
   public static void clearCache() {
     if (cache != null) {
@@ -147,7 +144,7 @@ public class CacheStore {
   }
 
   /**
-   * Print user accounts
+   * Print user accounts.
    */
   public static String print() {
     List<UserAccount> listOfUserAccounts = cache.getCacheDataInListForm();
@@ -161,21 +158,21 @@ public class CacheStore {
   }
 
   /**
-   * Delegate to backing cache store
+   * Delegate to backing cache store.
    */
   public static UserAccount get(String userId) {
     return cache.get(userId);
   }
 
   /**
-   * Delegate to backing cache store
+   * Delegate to backing cache store.
    */
   public static void set(String userId, UserAccount userAccount) {
     cache.set(userId, userAccount);
   }
 
   /**
-   * Delegate to backing cache store
+   * Delegate to backing cache store.
    */
   public static void invalidate(String userId) {
     cache.invalidate(userId);

caching/src/main/java/com/iluwatar/caching/CachingPolicy.java

@@ -24,9 +24,7 @@
 package com.iluwatar.caching;
 
 /**
- *
  * Enum class containing the four caching strategies implemented in the pattern.
- *
  */
 public enum CachingPolicy {
   THROUGH("through"), AROUND("around"), BEHIND("behind"), ASIDE("aside");

caching/src/main/java/com/iluwatar/caching/DbManager.java

@@ -23,28 +23,24 @@
 
 package com.iluwatar.caching;
 
-import java.text.ParseException;
-import java.util.HashMap;
-import java.util.Map;
-
-import org.bson.Document;
-
 import com.iluwatar.caching.constants.CachingConstants;
 import com.mongodb.MongoClient;
 import com.mongodb.client.FindIterable;
 import com.mongodb.client.MongoDatabase;
 import com.mongodb.client.model.UpdateOptions;
+import java.text.ParseException;
+import java.util.HashMap;
+import java.util.Map;
+import org.bson.Document;
 
 /**
+ * <p>DBManager handles the communication with the underlying data store i.e. Database. It contains
+ * the implemented methods for querying, inserting, and updating data. MongoDB was used as the
+ * database for the application.</p>
  *
- * <p>DBManager handles the communication with the underlying data store i.e. Database. It contains the
+ * <p>Developer/Tester is able to choose whether the application should use MongoDB as its
- * implemented methods for querying, inserting, and updating data. MongoDB was used as the database
+ * underlying data storage (connect()) or a simple Java data structure to (temporarily) store the
- * for the application.</p>
+ * data/objects during runtime (createVirtualDB()).</p>
- * 
- * <p>Developer/Tester is able to choose whether the application should use MongoDB as its underlying
- * data storage (connect()) or a simple Java data structure to (temporarily) store the data/objects
- * during runtime (createVirtualDB()).</p>
- * 
  */
 public final class DbManager {
 
@@ -58,7 +54,7 @@ public final class DbManager {
   }
 
   /**
-   * Create DB
+   * Create DB.
    */
   public static void createVirtualDb() {
     useMongoDB = false;
@@ -66,7 +62,7 @@ public final class DbManager {
   }
 
   /**
-   * Connect to DB
+   * Connect to DB.
    */
   public static void connect() throws ParseException {
     useMongoDB = true;
@@ -75,7 +71,7 @@ public final class DbManager {
   }
 
   /**
-   * Read user account from DB
+   * Read user account from DB.
    */
   public static UserAccount readFromDb(String userId) {
     if (!useMongoDB) {
@@ -91,17 +87,20 @@ public final class DbManager {
         e.printStackTrace();
       }
     }
-    FindIterable<Document> iterable =
+    FindIterable<Document> iterable = db
-        db.getCollection(CachingConstants.USER_ACCOUNT).find(new Document(CachingConstants.USER_ID, userId));
+        .getCollection(CachingConstants.USER_ACCOUNT)
+        .find(new Document(CachingConstants.USER_ID, userId));
     if (iterable == null) {
       return null;
     }
     Document doc = iterable.first();
-    return new UserAccount(userId, doc.getString(CachingConstants.USER_NAME), doc.getString(CachingConstants.ADD_INFO));
+    String userName = doc.getString(CachingConstants.USER_NAME);
+    String appInfo = doc.getString(CachingConstants.ADD_INFO);
+    return new UserAccount(userId, userName, appInfo);
   }
 
   /**
-   * Write user account to DB
+   * Write user account to DB.
    */
   public static void writeToDb(UserAccount userAccount) {
     if (!useMongoDB) {
@@ -116,12 +115,14 @@ public final class DbManager {
       }
     }
     db.getCollection(CachingConstants.USER_ACCOUNT).insertOne(
-        new Document(CachingConstants.USER_ID ,userAccount.getUserId()).append(CachingConstants.USER_NAME,
+        new Document(CachingConstants.USER_ID, userAccount.getUserId())
-            userAccount.getUserName()).append(CachingConstants.ADD_INFO, userAccount.getAdditionalInfo()));
+            .append(CachingConstants.USER_NAME, userAccount.getUserName())
+            .append(CachingConstants.ADD_INFO, userAccount.getAdditionalInfo())
+    );
   }
 
   /**
-   * Update DB
+   * Update DB.
    */
   public static void updateDb(UserAccount userAccount) {
     if (!useMongoDB) {
@@ -142,7 +143,6 @@ public final class DbManager {
   }
 
   /**
-   *
    * Insert data into DB if it does not exist. Else, update it.
    */
   public static void upsertDb(UserAccount userAccount) {
@@ -161,8 +161,10 @@ public final class DbManager {
         new Document(CachingConstants.USER_ID, userAccount.getUserId()),
         new Document("$set",
             new Document(CachingConstants.USER_ID, userAccount.getUserId())
-                .append(CachingConstants.USER_NAME, userAccount.getUserName()).append(CachingConstants.ADD_INFO,
+                .append(CachingConstants.USER_NAME, userAccount.getUserName())
-                    userAccount.getAdditionalInfo())),
+                .append(CachingConstants.ADD_INFO, userAccount.getAdditionalInfo())
-        new UpdateOptions().upsert(true));
+        ),
+        new UpdateOptions().upsert(true)
+    );
   }
 }

caching/src/main/java/com/iluwatar/caching/LruCache.java

@@ -23,22 +23,19 @@
 
 package com.iluwatar.caching;
 
-import org.slf4j.Logger;
-import org.slf4j.LoggerFactory;
-
 import java.util.ArrayList;
 import java.util.HashMap;
 import java.util.List;
 import java.util.Map;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
 
 /**
- *
  * Data structure/implementation of the application's cache. The data structure consists of a hash
  * table attached with a doubly linked-list. The linked-list helps in capturing and maintaining the
  * LRU data in the cache. When a data is queried (from the cache), added (to the cache), or updated,
  * the data is moved to the front of the list to depict itself as the most-recently-used data. The
  * LRU data is always at the end of the list.
- *
  */
 public class LruCache {
 
@@ -66,7 +63,7 @@ public class LruCache {
   }
 
   /**
-   * Get user account
+   * Get user account.
    */
   public UserAccount get(String userId) {
     if (cache.containsKey(userId)) {
@@ -110,7 +107,7 @@ public class LruCache {
   }
 
   /**
-   * Set user account
+   * Set user account.
    */
   public void set(String userId, UserAccount userAccount) {
     if (cache.containsKey(userId)) {
@@ -137,7 +134,7 @@ public class LruCache {
   }
 
   /**
-   * Invalidate cache for user
+   * Invalidate cache for user.
    */
   public void invalidate(String userId) {
     Node toBeRemoved = cache.remove(userId);
@@ -156,7 +153,7 @@ public class LruCache {
   }
 
   /**
-   * Clear cache
+   * Clear cache.
    */
   public void clear() {
     head = null;
@@ -178,12 +175,12 @@ public class LruCache {
   }
 
   /**
-   * Set cache capacity
+   * Set cache capacity.
    */
   public void setCapacity(int newCapacity) {
     if (capacity > newCapacity) {
       clear(); // Behavior can be modified to accommodate for decrease in cache size. For now, we'll
-               // just clear the cache.
+      // just clear the cache.
     } else {
       this.capacity = newCapacity;
     }

caching/src/main/java/com/iluwatar/caching/UserAccount.java

@@ -32,7 +32,7 @@ public class UserAccount {
   private String additionalInfo;
 
   /**
-   * Constructor
+   * Constructor.
    */
   public UserAccount(String userId, String userName, String additionalInfo) {
     this.userId = userId;

caching/src/main/java/com/iluwatar/caching/constants/CachingConstants.java

@@ -24,9 +24,7 @@
 package com.iluwatar.caching.constants;
 
 /**
- * 
+ * Constant class for defining constants.
- * Constant class for defining constants
- *
  */
 public class CachingConstants {