Fixed license header in UpdateSummaryBuilder.java
diff --git a/core/src/main/java/org/apache/metamodel/UpdateSummaryBuilder.java b/core/src/main/java/org/apache/metamodel/UpdateSummaryBuilder.java
index 6469a1b..eaad580 100644
--- a/core/src/main/java/org/apache/metamodel/UpdateSummaryBuilder.java
+++ b/core/src/main/java/org/apache/metamodel/UpdateSummaryBuilder.java
@@ -1,4 +1,5 @@
 /**
+ * Licensed to the Apache Software Foundation (ASF) under one
  * or more contributor license agreements.  See the NOTICE file
  * distributed with this work for additional information
  * regarding copyright ownership.  The ASF licenses this file