Made several small adjustments:

-regarding disconnection handling
-corrected import statements in GameFunctions.java

src/main/java/ch/unibas/dmi/dbis/cs108/gamelogic/GameFunctions.java

@@ -1,8 +1,8 @@
 package ch.unibas.dmi.dbis.cs108.gamelogic;
 
 import ch.unibas.dmi.dbis.cs108.BudaLogConfig;
-import ch.unibas.dmi.dbis.cs108.klassenstruktur.Human;
-import ch.unibas.dmi.dbis.cs108.klassenstruktur.Passenger;
+import ch.unibas.dmi.dbis.cs108.gamelogic.klassenstruktur.Human;
+import ch.unibas.dmi.dbis.cs108.gamelogic.klassenstruktur.Passenger;
 import org.apache.logging.log4j.LogManager;
 import org.apache.logging.log4j.Logger;
 

src/main/java/ch/unibas/dmi/dbis/cs108/multiplayer/client/MessageFormatter.java

@@ -32,7 +32,7 @@ public class MessageFormatter {
         break;
       case "/q":
         stringBuilder.append("QUITS$");
-        s = msg.substring(3);
+        s = "";
         break;
       case "/n":
         stringBuilder.append("NAMEC$");

src/main/java/ch/unibas/dmi/dbis/cs108/multiplayer/server/ClientHandler.java

@@ -89,7 +89,7 @@ public class ClientHandler implements Runnable {
     String msg;
     while (socket.isConnected()) {
       try {
-        msg = in.readLine();
+        msg = in.readLine();      //todo: here is where the server throws an exception when the client quits
         JServerProtocolParser.parse(msg, this);
       } catch (IOException e) {
         e.printStackTrace();
@@ -132,7 +132,7 @@ public class ClientHandler implements Runnable {
   }
 
   /** Sends a given message to client
-   *
+   * todo: check for exception if out is closed.
    * @param msg the given message
    */
 

src/main/java/ch/unibas/dmi/dbis/cs108/multiplayer/server/JServerProtocolParser.java

@@ -9,6 +9,11 @@ public class JServerProtocolParser {
   public static final Logger LOGGER = LogManager.getLogger();
   public static final BudaLogConfig l = new BudaLogConfig(LOGGER);
 
+  /**
+   * jsdcjkhcsdjksdacjkn
+   */
+  public static final String CHATA = "CHATA";
+
   /**
    * Used by the server (i.e. ClientHandler) to parse an incoming protocol message.
    *
@@ -23,7 +28,7 @@ public class JServerProtocolParser {
       System.out.println("Received unknown command");
     }
     switch (header) {
-      case "CHATA":
+      case CHATA:
         //sends chat message to all connected clients
         h.broadcastMessage(msg.substring(6));
         break;