Update: Added Multiplayer classes.

src/main/java/de/hdm_stuttgart/battlearena/Model/Multiplayer/Server.java

@@ -34,6 +34,7 @@ public class Server {
         server.start(ipaddress, 4444);
     } */
 
+    //use this method to start the server from another class
      public void startServer() throws IOException {
         Server server = new Server();
         log.info("server starting...");