Add license to MemoryCheckstyle.xml
diff --git a/tools/MemoryCheckstyle.xml b/tools/MemoryCheckstyle.xml
index 2ab9697..3b80313 100644
--- a/tools/MemoryCheckstyle.xml
+++ b/tools/MemoryCheckstyle.xml
@@ -2,6 +2,25 @@
<!DOCTYPE module PUBLIC "-//Checkstyle//DTD Checkstyle Configuration 1.3//EN" "https://checkstyle.org/dtds/configuration_1_3.dtd">
<!--
+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
+to you 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.
+-->
+
+<!--
This configuration file was written by the eclipse-cs plugin configuration editor
-->
<!--
