Added license headers
diff --git a/curator-client/src/main/java/org/apache/curator/utils/CloseableExecutorService.java b/curator-client/src/main/java/org/apache/curator/utils/CloseableExecutorService.java
index 8ff7b32..bb4855d 100644
--- a/curator-client/src/main/java/org/apache/curator/utils/CloseableExecutorService.java
+++ b/curator-client/src/main/java/org/apache/curator/utils/CloseableExecutorService.java
@@ -1,4 +1,4 @@
-/*
+/**
  * 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
diff --git a/curator-client/src/main/java/org/apache/curator/utils/CloseableScheduledExecutorService.java b/curator-client/src/main/java/org/apache/curator/utils/CloseableScheduledExecutorService.java
index c2bea63..6f3797d 100644
--- a/curator-client/src/main/java/org/apache/curator/utils/CloseableScheduledExecutorService.java
+++ b/curator-client/src/main/java/org/apache/curator/utils/CloseableScheduledExecutorService.java
@@ -1,4 +1,4 @@
-/*
+/**
  * 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
diff --git a/curator-client/src/test/java/org/apache/curator/utils/TestCloseableExecutorService.java b/curator-client/src/test/java/org/apache/curator/utils/TestCloseableExecutorService.java
index cb71116..c083655 100644
--- a/curator-client/src/test/java/org/apache/curator/utils/TestCloseableExecutorService.java
+++ b/curator-client/src/test/java/org/apache/curator/utils/TestCloseableExecutorService.java
@@ -1,4 +1,4 @@
-/*
+/**
  * 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