diff --git a/tools/bisection-search/README.md b/tools/bisection_search/README.md
similarity index 100%
rename from tools/bisection-search/README.md
rename to tools/bisection_search/README.md
diff --git a/tools/bisection_search/__init__.py b/tools/bisection_search/__init__.py
new file mode 100644
index 0000000..0a42789
--- /dev/null
+++ b/tools/bisection_search/__init__.py
@@ -0,0 +1,17 @@
+#
+# Copyright (C) 2016 The Android Open Source Project
+#
+# 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 file is intentionally left empty. It indicates that the directory is a Python package.
diff --git a/tools/bisection-search/bisection_search.py b/tools/bisection_search/bisection_search.py
similarity index 100%
rename from tools/bisection-search/bisection_search.py
rename to tools/bisection_search/bisection_search.py
diff --git a/tools/bisection-search/bisection_test.py b/tools/bisection_search/bisection_test.py
similarity index 100%
rename from tools/bisection-search/bisection_test.py
rename to tools/bisection_search/bisection_test.py
diff --git a/tools/bisection-search/common.py b/tools/bisection_search/common.py
similarity index 100%
rename from tools/bisection-search/common.py
rename to tools/bisection_search/common.py
diff --git a/tools/javafuzz/__init__.py b/tools/javafuzz/__init__.py
new file mode 100644
index 0000000..3955c71
--- /dev/null
+++ b/tools/javafuzz/__init__.py
@@ -0,0 +1,17 @@
+#
+# Copyright (C) 2016 The Android Open Source Project
+#
+# 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 file is intentionally left empty. It indicates that the directory is a Python package.
\ No newline at end of file