Resolves checkstyle errors for event-* (#1070)

* Reduces checkstyle errors in event-aggregator

* Reduces checkstyle errors in event-asynchronous

* Reduces checkstyle errors in event-driven-architecture

* Reduces checkstyle errors in event-queue

* Reduces checkstyle errors in event-sourcing

event-aggregator/src/main/java/com/iluwatar/event/aggregator/App.java

@@ -27,24 +27,22 @@ import java.util.ArrayList;
 import java.util.List;
 
 /**
- * 
  * A system with lots of objects can lead to complexities when a client wants to subscribe to
  * events. The client has to find and register for each object individually, if each object has
  * multiple events then each event requires a separate subscription.
- * <p>
- * An Event Aggregator acts as a single source of events for many objects. It registers for all the
- * events of the many objects allowing clients to register with just the aggregator.
- * <p>
- * In the example {@link LordBaelish}, {@link LordVarys} and {@link Scout} deliver events to
- * {@link KingsHand}. {@link KingsHand}, the event aggregator, then delivers the events to
- * {@link KingJoffrey}.
  *
+ * <p>An Event Aggregator acts as a single source of events for many objects. It registers for all
+ * the events of the many objects allowing clients to register with just the aggregator.
+ *
+ * <p>In the example {@link LordBaelish}, {@link LordVarys} and {@link Scout} deliver events to
+ * {@link KingsHand}. {@link KingsHand}, the event aggregator, then delivers the events to {@link
+ * KingJoffrey}.
  */
 public class App {
 
   /**
-   * Program entry point
-   * 
+   * Program entry point.
+   *
    * @param args command line args
    */
   public static void main(String[] args) {

event-aggregator/src/main/java/com/iluwatar/event/aggregator/Event.java

@@ -24,9 +24,7 @@
 package com.iluwatar.event.aggregator;
 
 /**
- * 
  * Event enumeration.
- *
  */
 public enum Event {
 

event-aggregator/src/main/java/com/iluwatar/event/aggregator/EventEmitter.java

@@ -27,9 +27,7 @@ import java.util.LinkedList;
 import java.util.List;
 
 /**
- * 
  * EventEmitter is the base class for event producers that can be observed.
- *
  */
 public abstract class EventEmitter {
 

event-aggregator/src/main/java/com/iluwatar/event/aggregator/EventObserver.java

@@ -24,9 +24,7 @@
 package com.iluwatar.event.aggregator;
 
 /**
- * 
  * Observers of events implement this interface.
- *
  */
 public interface EventObserver {
 

event-aggregator/src/main/java/com/iluwatar/event/aggregator/KingJoffrey.java

@@ -27,9 +27,7 @@ import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
 
 /**
- * 
  * KingJoffrey observes events from {@link KingsHand}.
- *
  */
 public class KingJoffrey implements EventObserver {
 

event-aggregator/src/main/java/com/iluwatar/event/aggregator/KingsHand.java

@@ -24,9 +24,7 @@
 package com.iluwatar.event.aggregator;
 
 /**
- * 
  * KingsHand observes events from multiple sources and delivers them to listeners.
- *
  */
 public class KingsHand extends EventEmitter implements EventObserver {
 

event-aggregator/src/main/java/com/iluwatar/event/aggregator/LordBaelish.java

@@ -24,9 +24,7 @@
 package com.iluwatar.event.aggregator;
 
 /**
- * 
  * LordBaelish produces events.
- *
  */
 public class LordBaelish extends EventEmitter {
 

event-aggregator/src/main/java/com/iluwatar/event/aggregator/LordVarys.java

@@ -24,9 +24,7 @@
 package com.iluwatar.event.aggregator;
 
 /**
- * 
  * LordVarys produces events.
- *
  */
 public class LordVarys extends EventEmitter {
 

event-aggregator/src/main/java/com/iluwatar/event/aggregator/Scout.java

@@ -24,9 +24,7 @@
 package com.iluwatar.event.aggregator;
 
 /**
- * 
  * Scout produces events.
- *
  */
 public class Scout extends EventEmitter {
 

event-aggregator/src/main/java/com/iluwatar/event/aggregator/Weekday.java

@@ -24,9 +24,7 @@
 package com.iluwatar.event.aggregator;
 
 /**
- * 
- * Weekday enumeration
- *
+ * Weekday enumeration.
  */
 public enum Weekday {