diff --git a/spring-security-kerberos-core/src/main/java/org/springframework/security/extensions/kerberos/KerberosTicketValidator.java b/spring-security-kerberos-core/src/main/java/org/springframework/security/extensions/kerberos/KerberosTicketValidator.java
index e22ba97..677d1fb 100644
--- a/spring-security-kerberos-core/src/main/java/org/springframework/security/extensions/kerberos/KerberosTicketValidator.java
+++ b/spring-security-kerberos-core/src/main/java/org/springframework/security/extensions/kerberos/KerberosTicketValidator.java
@@ -1,5 +1,27 @@
+/*
+ * Copyright 2002-2008 the original author or authors.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
 package org.springframework.security.extensions.kerberos;
 
+/**
+ * 
+ * @author Mike Wiesner
+ * @since 1.0
+ * @version $Id$
+ */
 public interface KerberosTicketValidator {
 
 	public abstract String validateTicket(byte[] token);