preparing message bus

bus/src/main/java/de/srsoftware/umbrella/messagebus/MessageBus.java

@@ -10,7 +10,13 @@ public class MessageBus {
 	private MessageBus(){}
 
 	public void dispatch(Event event){
-		listeners.parallelStream().forEach(l -> l.onEvent(event));
+		new Thread(() -> { // TODO: use thread pool
+			try {
+				Thread.sleep(100);
+				listeners.parallelStream().forEach(l -> l.onEvent(event));
+			} catch (InterruptedException ignored) {
+			}
+		}).start();
 	}
 
 	public void drop(EventListener listener){