Java Doc and CodeStyle improvements

server/src/main/java/ch/zhaw/pm2/multichat/server/Server.java

@@ -19,6 +19,10 @@ public class Server {
     // Connection registry
     private Map<String,ServerConnectionHandler> connections = new HashMap<>();
 
+    /**
+     *
+     * @param args
+     */
     public static void main(String[] args) {
         // Parse arguments for server port.
         try {