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 174016e..4db7278 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
@@ -13,6 +13,11 @@ public class Customers {
 		return false;
 	}
 	
+	/**
+	 * 
+	 * @param user New User to register.
+	 * @return
+	 */
 	public User registerUser(User user) {
 		return pool.putIfAbsent(user.nickName, user);
 	}