diff --git a/adapters/__init__.py b/adapters/__init__.py
index e69de29..58aca1e 100644
--- a/adapters/__init__.py
+++ b/adapters/__init__.py
@@ -0,0 +1,13 @@
+# Copyright 2018 the original author or authors.
+#
+# 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.
diff --git a/adapters/interface.py b/adapters/interface.py
index 860c8ba..d1ac455 100644
--- a/adapters/interface.py
+++ b/adapters/interface.py
@@ -767,4 +767,4 @@
     #     :param packet: the actual packet; can be a serialized string or a
     #     scapy Packet.
     #     :return: None returned on success
-    #     """
\ No newline at end of file
+    #     """
diff --git a/adapters/kafka/__init__.py b/adapters/kafka/__init__.py
index e69de29..58aca1e 100644
--- a/adapters/kafka/__init__.py
+++ b/adapters/kafka/__init__.py
@@ -0,0 +1,13 @@
+# Copyright 2018 the original author or authors.
+#
+# 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.
diff --git a/adapters/kafka/kafka_inter_container_library.py b/adapters/kafka/kafka_inter_container_library.py
index ad53812..f5bb720 100644
--- a/adapters/kafka/kafka_inter_container_library.py
+++ b/adapters/kafka/kafka_inter_container_library.py
@@ -1,5 +1,19 @@
 #!/usr/bin/env python
 
+# Copyright 2018 the original author or authors.
+#
+# 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.
+
 from zope.interface import Interface, implementer
 from adapters.kafka.kafka_proxy import KafkaProxy, get_kafka_proxy
 from twisted.internet import reactor
diff --git a/adapters/ponsim_olt/ponsim_olt.yml b/adapters/ponsim_olt/ponsim_olt.yml
index fdb647a..7c7fac3 100644
--- a/adapters/ponsim_olt/ponsim_olt.yml
+++ b/adapters/ponsim_olt/ponsim_olt.yml
@@ -1,3 +1,18 @@
+---
+# Copyright 2018 the original author or authors.
+#
+# 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.
+
 logging:
     version: 1
 
diff --git a/adapters/ponsim_onu/ponsim_onu.yml b/adapters/ponsim_onu/ponsim_onu.yml
index 1afafdf..aa9d43c 100644
--- a/adapters/ponsim_onu/ponsim_onu.yml
+++ b/adapters/ponsim_onu/ponsim_onu.yml
@@ -1,3 +1,18 @@
+---
+# Copyright 2018 the original author or authors.
+#
+# 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.
+
 logging:
     version: 1