Added a common listener interface, used in all existing listeners

src/main/java/com/mrcrayfish/device/api/app/interfaces/IListener.java

@@ -0,0 +1,11 @@
+package com.mrcrayfish.device.api.app.interfaces;
+
+/**
+ * Common listener interface.
+ * All other listeners should
+ * extend this interface.
+ *
+ * @author Jochem Broekhoff
+ */
+public interface IListener {
+}

src/main/java/com/mrcrayfish/device/api/app/listener/ChangeListener.java

@@ -1,12 +1,14 @@
 package com.mrcrayfish.device.api.app.listener;
 
+import com.mrcrayfish.device.api.app.interfaces.IListener;
+
 /**
  * The change listener interface. Used for handling value
  * changing in components
  *
  * @author MrCrayfish
  */
-public interface ChangeListener<T>
+public interface ChangeListener<T> extends IListener
 {
     /**
      * Called when the value is changed

src/main/java/com/mrcrayfish/device/api/app/listener/ClickListener.java

@@ -1,12 +1,14 @@
 package com.mrcrayfish.device.api.app.listener;
 
+import com.mrcrayfish.device.api.app.interfaces.IListener;
+
 /**
  * The click listener interface. Used for handling clicks
  * on components.
  * 
  * @author MrCrayfish
  */
-public interface ClickListener 
+public interface ClickListener extends IListener
 {
 	/**
 	 * Called when component is clicked

src/main/java/com/mrcrayfish/device/api/app/listener/InitListener.java

@@ -1,12 +1,14 @@
 package com.mrcrayfish.device.api.app.listener;
 
+import com.mrcrayfish.device.api.app.interfaces.IListener;
+
 /**
  * The initialization listener interface. Used for running
  * code when a layout is initialized.
  * 
  * @author MrCrayfish
  */
-public interface InitListener
+public interface InitListener extends IListener
 {
 	/**
 	 * Called when a layout is set as the current layout.

src/main/java/com/mrcrayfish/device/api/app/listener/ItemClickListener.java

@@ -1,12 +1,14 @@
 package com.mrcrayfish.device.api.app.listener;
 
+import com.mrcrayfish.device.api.app.interfaces.IListener;
+
 /**
  * The click listener interface. Used for handling clicks
  * on components.
  * 
  * @author MrCrayfish
  */
-public interface ItemClickListener<E> 
+public interface ItemClickListener<E> extends IListener
 {
 	/**
 	 * Called when component is clicked

src/main/java/com/mrcrayfish/device/api/app/listener/KeyListener.java

@@ -1,9 +1,11 @@
 package com.mrcrayfish.device.api.app.listener;
 
+import com.mrcrayfish.device.api.app.interfaces.IListener;
+
 /**
  * Author: MrCrayfish
  */
-public interface KeyListener
+public interface KeyListener extends IListener
 {
     boolean onKeyTyped(char c);
 }

src/main/java/com/mrcrayfish/device/api/app/listener/ReleaseListener.java

@@ -1,14 +1,15 @@
 package com.mrcrayfish.device.api.app.listener;
 
 import com.mrcrayfish.device.api.app.Component;
+import com.mrcrayfish.device.api.app.interfaces.IListener;
 
 /**
  * The release listener interface. Used for handling releasing 
  * clicks on components.
  * 
  * @author MrCrayfish
  */
-public interface ReleaseListener 
+public interface ReleaseListener extends IListener
 {
 	/**
 	 * Called when a click on a component is released

src/main/java/com/mrcrayfish/device/api/app/listener/SlideListener.java

@@ -1,6 +1,7 @@
 package com.mrcrayfish.device.api.app.listener;
 
 import com.mrcrayfish.device.api.app.component.Slider;
+import com.mrcrayfish.device.api.app.interfaces.IListener;
 
 /**
  * The slider listener interface. Used for getting
@@ -9,7 +10,7 @@
  * 
  * @author MrCrayfish
  */
-public interface SlideListener 
+public interface SlideListener extends IListener
 {
 	/**
 	 * Called when a sliders position has moved