diff --git a/atomqc/__init__.py b/atomqc/__init__.py
index 8b13789..2683b5a 100644
--- a/atomqc/__init__.py
+++ b/atomqc/__init__.py
@@ -1 +1,3 @@
+"""Version number."""
 
+__version__ = "2024.3.24"
diff --git a/atomqc/data/__init__.py b/atomqc/data/__init__.py
new file mode 100644
index 0000000..50879b7
--- /dev/null
+++ b/atomqc/data/__init__.py
@@ -0,0 +1 @@
+"""Module for data."""
diff --git a/atomqc/data/__initi__.py b/atomqc/data/__initi__.py
deleted file mode 100644
index 8b13789..0000000
--- a/atomqc/data/__initi__.py
+++ /dev/null
@@ -1 +0,0 @@
-