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 86a4a94..e2fd71a 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
@@ -5,6 +5,12 @@ import java.util.HashMap;
 public class Customers {
 	HashMap<String, User> pool = new HashMap<String, User>();
 	
+	/**
+	 * 
+	 * @param nickname Is the particular Nickname free to use?
+	 * @return true if nickname is Available.
+	 * @return false if nickname is Available.
+	 */
 	public boolean nickNameAvailable(String nickname) {
 		User u = pool.get(nickname);
 		if (null == u) {