diff --git a/src/main/java/de/hs_mannheim/facade/Application.java b/src/main/java/de/hs_mannheim/facade/Application.java
new file mode 100644
index 0000000..b98778f
--- /dev/null
+++ b/src/main/java/de/hs_mannheim/facade/Application.java
@@ -0,0 +1,47 @@
+package de.hs_mannheim.facade;
+
+import java.util.TreeSet;
+
+import de.hs_mannheim.domain.System;
+
+public class Application {
+    
+    private System running_system;
+
+    public Application(){
+        this.running_system = new System();
+    }
+
+    public boolean sign_in_user(String username, String password){
+        return true;
+    }
+
+    public boolean sign_up_user(String username, String password, String hometown, int zip, 
+                                String car_name, double car_co2_km, double car_avg_kmh, double bike_avg_kmh){
+        return true;
+    }
+
+    public void sign_out_user(){}
+
+    public boolean change_user_details(String username, String password, String hometown, int zip, 
+                                String car_name, double car_co2_km, double car_avg_kmh, double bike_avg_kmh){
+        return true;
+    }
+
+    public TreeSet<String> search(String hometown_or_zip){
+        return new TreeSet<String>();
+    }
+
+    public TreeSet<String> random_destinations(){
+        return new TreeSet<String>();
+    }
+
+    public String[] destination_details(String destination_zip){
+        return new String[1];
+    }
+
+    public String current_weather(){
+        return "";
+    }
+
+}