Added tests for Connection

git-svn-id: svn://sunsvr01.isp.uni-luebeck.de/swproj13/trunk@150 72836036-5685-4462-b002-a69064685172

src/jrummikub/util/Connection.java

@@ -0,0 +1,5 @@
+package jrummikub.util;
+
+public interface Connection {
+	public void remove();
+}

src/jrummikub/util/Event.java

@@ -7,8 +7,9 @@ public class Event implements IEvent {
   private HashSet<IListener> listeners = new HashSet<IListener>();
 
   @Override
-  public void add(IListener listener) {
+  public Connection add(IListener listener) {
     listeners.add(listener);
+    return null;
   }
 
   @Override

src/jrummikub/util/Event1.java

@@ -12,8 +12,9 @@ public class Event1<T> implements IEvent1<T> {
 	private HashSet<IListener1<T>> listeners = new HashSet<IListener1<T>>();
 
 	@Override
-	public void add(IListener1<T> listener) {
+	public Connection add(IListener1<T> listener) {
 		listeners.add(listener);
+		return null;
 	}
 
 	@Override

src/jrummikub/util/Event2.java

@@ -14,8 +14,9 @@ public class Event2<T1, T2> implements IEvent2<T1, T2> {
 	private HashSet<IListener2<T1, T2>> listeners = new HashSet<IListener2<T1, T2>>();
 
 	@Override
-	public void add(IListener2<T1, T2> listener) {
+	public Connection add(IListener2<T1, T2> listener) {
 		listeners.add(listener);
+		return null;
 	}
 
 	@Override

src/jrummikub/util/IEvent.java

@@ -8,7 +8,7 @@ public interface IEvent {
 	 * @param listener
 	 *            target listener
 	 */
-	public void add(IListener listener);
+	public Connection add(IListener listener);
 
 	/**
 	 * Stop publishing events to a given listener

src/jrummikub/util/IEvent1.java

@@ -13,7 +13,7 @@ public interface IEvent1<T> {
 	 * @param listener
 	 *            target listener
 	 */
-	public void add(IListener1<T> listener);
+	public Connection add(IListener1<T> listener);
 
 	/**
 	 * Stop publishing events to a given listener

src/jrummikub/util/IEvent2.java

@@ -15,7 +15,7 @@ public interface IEvent2<T1, T2> {
 	 * @param listener
 	 *            target listener
 	 */
-	public void add(IListener2<T1, T2> listener);
+	public Connection add(IListener2<T1, T2> listener);
 
 	/**
 	 * Stop publishing events to a given listener