diff --git a/src/main/java/com/alibaba/druid/pool/ha/selector/DataSourceSelectorEnum.java b/src/main/java/com/alibaba/druid/pool/ha/selector/DataSourceSelectorEnum.java
index 6337716629..99f0f2ad88 100644
--- a/src/main/java/com/alibaba/druid/pool/ha/selector/DataSourceSelectorEnum.java
+++ b/src/main/java/com/alibaba/druid/pool/ha/selector/DataSourceSelectorEnum.java
@@ -1,3 +1,18 @@
+/*
+ * Copyright 1999-2018 Alibaba Group Holding Ltd.
+ *
+ * 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 com.alibaba.druid.pool.ha.selector;
 
 import com.alibaba.druid.pool.ha.HighAvailableDataSource;
diff --git a/src/main/java/com/alibaba/druid/pool/ha/selector/StickyDataSourceHolder.java b/src/main/java/com/alibaba/druid/pool/ha/selector/StickyDataSourceHolder.java
index e69659e85d..a924a425a1 100644
--- a/src/main/java/com/alibaba/druid/pool/ha/selector/StickyDataSourceHolder.java
+++ b/src/main/java/com/alibaba/druid/pool/ha/selector/StickyDataSourceHolder.java
@@ -1,3 +1,18 @@
+/*
+ * Copyright 1999-2018 Alibaba Group Holding Ltd.
+ *
+ * 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 com.alibaba.druid.pool.ha.selector;
 
 import javax.sql.DataSource;
diff --git a/src/main/java/com/alibaba/druid/pool/ha/selector/StickyRandomDataSourceSelector.java b/src/main/java/com/alibaba/druid/pool/ha/selector/StickyRandomDataSourceSelector.java
index b4ebf7de55..a06b8de271 100644
--- a/src/main/java/com/alibaba/druid/pool/ha/selector/StickyRandomDataSourceSelector.java
+++ b/src/main/java/com/alibaba/druid/pool/ha/selector/StickyRandomDataSourceSelector.java
@@ -1,3 +1,18 @@
+/*
+ * Copyright 1999-2018 Alibaba Group Holding Ltd.
+ *
+ * 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 com.alibaba.druid.pool.ha.selector;
 
 import com.alibaba.druid.pool.DruidDataSource;