diff --git a/block.cpp b/block.cpp
new file mode 100644
index 000000000..974acbf6d
--- /dev/null
+++ b/block.cpp
@@ -0,0 +1,21 @@
+/*
+    This file is part of cpp-ethereum.
+
+    cpp-ethereum is free software: you can redistribute it and/or modify
+    it under the terms of the GNU General Public License as published by
+    the Free Software Foundation, either version 3 of the License, or
+    (at your option) any later version.
+
+    cpp-ethereum is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU General Public License for more details.
+
+    You should have received a copy of the GNU General Public License
+    along with cpp-ethereum.  If not, see <http://www.gnu.org/licenses/>.
+*/
+/** @file state.cpp
+ * @author Christoph Jentzsch <cj@ethdev.com>
+ * @date 2014
+ * block test functions.
+ */