diff --git a/projjpn/src/main/java/de/hs_fulda/ciip/projjpn/Customers.java b/projjpn/src/main/java/de/hs_fulda/ciip/projjpn/Customers.java
index 4db7278..98fb54a 100644
--- a/projjpn/src/main/java/de/hs_fulda/ciip/projjpn/Customers.java
+++ b/projjpn/src/main/java/de/hs_fulda/ciip/projjpn/Customers.java
@@ -22,6 +22,11 @@ public class Customers {
 		return pool.putIfAbsent(user.nickName, user);
 	}
 	
+	/**
+	 * 
+	 * @param userNickname Delete a particular User with the given nickname
+	 * @return null or the deleted user.
+	 */
 	public User deleteUser(String userNickname) {
 		return pool.remove(userNickname);
 	}