diff --git a/catalog-rest-service/src/main/java/org/openmetadata/catalog/events/AuditEventHandler.java b/catalog-rest-service/src/main/java/org/openmetadata/catalog/events/AuditEventHandler.java
index 878471f7681..7e2dd4de7e9 100644
--- a/catalog-rest-service/src/main/java/org/openmetadata/catalog/events/AuditEventHandler.java
+++ b/catalog-rest-service/src/main/java/org/openmetadata/catalog/events/AuditEventHandler.java
@@ -1,3 +1,19 @@
+/*
+ *  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.
+ */
+
 package org.openmetadata.catalog.events;
 
 import org.openmetadata.catalog.CatalogApplicationConfig;
diff --git a/catalog-rest-service/src/main/java/org/openmetadata/catalog/events/ElasticSearchEventHandler.java b/catalog-rest-service/src/main/java/org/openmetadata/catalog/events/ElasticSearchEventHandler.java
index a03ffc9fd14..e765f4139e9 100644
--- a/catalog-rest-service/src/main/java/org/openmetadata/catalog/events/ElasticSearchEventHandler.java
+++ b/catalog-rest-service/src/main/java/org/openmetadata/catalog/events/ElasticSearchEventHandler.java
@@ -1,3 +1,19 @@
+/*
+ *  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.
+ */
+
 package org.openmetadata.catalog.events;
 
 import org.apache.http.HttpHost;
@@ -12,8 +28,6 @@ import org.openmetadata.catalog.ElasticSearchConfiguration;
 import org.openmetadata.catalog.Entity;
 import org.openmetadata.catalog.entity.data.Table;
 import org.openmetadata.catalog.type.Column;
-import org.openmetadata.catalog.type.TagLabel;
-import org.openmetadata.catalog.util.JsonUtils;
 import org.skife.jdbi.v2.DBI;
 import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
diff --git a/catalog-rest-service/src/main/java/org/openmetadata/catalog/events/EventFilter.java b/catalog-rest-service/src/main/java/org/openmetadata/catalog/events/EventFilter.java
index dc7a718ce21..b25474ea9b6 100644
--- a/catalog-rest-service/src/main/java/org/openmetadata/catalog/events/EventFilter.java
+++ b/catalog-rest-service/src/main/java/org/openmetadata/catalog/events/EventFilter.java
@@ -41,7 +41,7 @@ public class EventFilter implements ContainerResponseFilter {
   private CatalogApplicationConfig config;
   private DBI jdbi;
   private final ForkJoinPool forkJoinPool;
-  List<EventHandler> eventHandlers;
+  private List<EventHandler> eventHandlers;
 
   public EventFilter(CatalogApplicationConfig config, DBI jdbi) {
     this.config = config;
diff --git a/catalog-rest-service/src/main/java/org/openmetadata/catalog/events/EventHandler.java b/catalog-rest-service/src/main/java/org/openmetadata/catalog/events/EventHandler.java
index 7a1f32a7519..a60f827af44 100644
--- a/catalog-rest-service/src/main/java/org/openmetadata/catalog/events/EventHandler.java
+++ b/catalog-rest-service/src/main/java/org/openmetadata/catalog/events/EventHandler.java
@@ -1,3 +1,19 @@
+/*
+ *  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.
+ */
+
 package org.openmetadata.catalog.events;
 
 import org.openmetadata.catalog.CatalogApplicationConfig;
diff --git a/catalog-rest-service/src/main/java/org/openmetadata/catalog/util/ParallelStreamUtil.java b/catalog-rest-service/src/main/java/org/openmetadata/catalog/util/ParallelStreamUtil.java
index 04184881ba3..5eb2d3df69e 100644
--- a/catalog-rest-service/src/main/java/org/openmetadata/catalog/util/ParallelStreamUtil.java
+++ b/catalog-rest-service/src/main/java/org/openmetadata/catalog/util/ParallelStreamUtil.java
@@ -1,3 +1,19 @@
+/*
+ *  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.
+ */
+
 package org.openmetadata.catalog.util;
 
 import com.google.common.base.Stopwatch;