diff --git a/aliby/__init__.py b/aliby/__init__.py
index e69de29bb2d1d6434b8b29ae775ad8c2e48c5391..d220f4694590fd25ff83abac08f5db241f542ff3 100644
--- a/aliby/__init__.py
+++ b/aliby/__init__.py
@@ -0,0 +1,3 @@
+"""
+Orchestration module and network mid-level interfaces.
+"""
diff --git a/extraction/__init__.py b/extraction/__init__.py
index e69de29bb2d1d6434b8b29ae775ad8c2e48c5391..9958ca7cd5b3451f49ca4b2531bec11d4132b940 100644
--- a/extraction/__init__.py
+++ b/extraction/__init__.py
@@ -0,0 +1,3 @@
+"""
+Handles quantification of image, labels and masks into numerical data structures.
+"""