diff --git a/src/main/java/de/hs_mannheim/facade/Application.java b/src/main/java/de/hs_mannheim/facade/Application.java
index 14d3c20..6db7b10 100644
--- a/src/main/java/de/hs_mannheim/facade/Application.java
+++ b/src/main/java/de/hs_mannheim/facade/Application.java
@@ -1,5 +1,6 @@
 package de.hs_mannheim.facade;
 
+import java.util.ArrayList;
 import java.util.TreeSet;
 
 import de.hs_mannheim.domain.System;
@@ -28,12 +29,12 @@ public class Application {
         return true;
     }
 
-    public TreeSet<String> search(String hometown_or_zip){
-        return new TreeSet<String>();
+    public ArrayList<String> search(String hometown_or_zip){
+        return new ArrayList<String>();
     }
 
-    public TreeSet<String> random_destinations(){
-        return new TreeSet<String>();
+    public ArrayList<String> random_destinations(){
+        return new ArrayList<String>();
     }
 
     public String[] destination_details(String destination_zip){