diff --git a/APED/app/src/main/java/com/example/aped/utils/TestFavorites.java b/APED/app/src/main/java/com/example/aped/utils/TestFavorites.java
index 18c185a..ad69d36 100644
--- a/APED/app/src/main/java/com/example/aped/utils/TestFavorites.java
+++ b/APED/app/src/main/java/com/example/aped/utils/TestFavorites.java
@@ -3,6 +3,10 @@ package com.example.aped.utils;
 import java.util.ArrayList;
 import java.util.List;
 
+/**
+ * implementation for the favorites interface
+ * does not use persistent storage!
+ */
 public class TestFavorites implements IFAVORITES{
 
     private List<String> favorites = new ArrayList<>();