diff --git a/optformer/__init__.py b/optformer/__init__.py
new file mode 100644
index 0000000..5bd2966
--- /dev/null
+++ b/optformer/__init__.py
@@ -0,0 +1,15 @@
+# Copyright 2022 Google LLC.
+#
+# 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.
+
+"""This empty file is needed to be recognized as a package by the setuptools."""
diff --git a/optformer/data/__init__.py b/optformer/data/__init__.py
new file mode 100644
index 0000000..5bd2966
--- /dev/null
+++ b/optformer/data/__init__.py
@@ -0,0 +1,15 @@
+# Copyright 2022 Google LLC.
+#
+# 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.
+
+"""This empty file is needed to be recognized as a package by the setuptools."""
diff --git a/optformer/data/protos/__init__.py b/optformer/data/protos/__init__.py
new file mode 100644
index 0000000..5bd2966
--- /dev/null
+++ b/optformer/data/protos/__init__.py
@@ -0,0 +1,15 @@
+# Copyright 2022 Google LLC.
+#
+# 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.
+
+"""This empty file is needed to be recognized as a package by the setuptools."""
diff --git a/optformer/t5x/__init__.py b/optformer/t5x/__init__.py
new file mode 100644
index 0000000..5bd2966
--- /dev/null
+++ b/optformer/t5x/__init__.py
@@ -0,0 +1,15 @@
+# Copyright 2022 Google LLC.
+#
+# 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.
+
+"""This empty file is needed to be recognized as a package by the setuptools."""
diff --git a/optformer/t5x/configs/__init__.py b/optformer/t5x/configs/__init__.py
new file mode 100644
index 0000000..5bd2966
--- /dev/null
+++ b/optformer/t5x/configs/__init__.py
@@ -0,0 +1,15 @@
+# Copyright 2022 Google LLC.
+#
+# 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.
+
+"""This empty file is needed to be recognized as a package by the setuptools."""
diff --git a/optformer/t5x/configs/models/__init__.py b/optformer/t5x/configs/models/__init__.py
new file mode 100644
index 0000000..73ba6af
--- /dev/null
+++ b/optformer/t5x/configs/models/__init__.py
@@ -0,0 +1,15 @@
+# Copyright 2022 Google LLC.
+#
+# 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.
+
+"""This empty file is needed for loading the gin files in this directory."""
diff --git a/optformer/t5x/configs/runs/__init__.py b/optformer/t5x/configs/runs/__init__.py
new file mode 100644
index 0000000..73ba6af
--- /dev/null
+++ b/optformer/t5x/configs/runs/__init__.py
@@ -0,0 +1,15 @@
+# Copyright 2022 Google LLC.
+#
+# 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.
+
+"""This empty file is needed for loading the gin files in this directory."""
diff --git a/optformer/t5x/configs/tasks/__init__.py b/optformer/t5x/configs/tasks/__init__.py
new file mode 100644
index 0000000..73ba6af
--- /dev/null
+++ b/optformer/t5x/configs/tasks/__init__.py
@@ -0,0 +1,15 @@
+# Copyright 2022 Google LLC.
+#
+# 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.
+
+"""This empty file is needed for loading the gin files in this directory."""