Make ErrorEvent also implement IEvent

Author: rubengees

library/src/main/java/com/proxerme/library/event/error/ErrorEvent.java

@@ -3,13 +3,14 @@
 import android.support.annotation.NonNull;
 
 import com.proxerme.library.connection.ProxerException;
+import com.proxerme.library.event.IEvent;
 
 /**
  * TODO: Describe Class
  *
  * @author Ruben Gees
  */
-public abstract class ErrorEvent {
+public abstract class ErrorEvent implements IEvent<ProxerException> {
 
     private ProxerException exception;
 
@@ -18,7 +19,8 @@ public ErrorEvent(@NonNull ProxerException exception) {
     }
 
     @NonNull
-    public ProxerException getException() {
+    @Override
+    public final ProxerException getItem() {
         return exception;
     }
 }