diff --git a/CommandRunner.py b/CommandRunner.py
new file mode 100644
index 0000000..aee3dff
--- /dev/null
+++ b/CommandRunner.py
@@ -0,0 +1,18 @@
+class CommandRunner(object):
+    """docstring for CommandRunner."""
+
+    def __init__(self):
+        super(CommandRunner).__init__()
+
+    def run(self, module):
+        print("REAL RUNNER")
+        print("Commands should be executed as subprocess.")
+
+
+class CommandRunnerDebug(object):
+    def __init__(self):
+        super(CommandRunnerDebug).__init__()
+
+    def run(self, module):
+        print("DEBUG RUNNER")
+        print(module.getCommand())
diff --git a/IModule.py b/IModule.py
new file mode 100644
index 0000000..377854d
--- /dev/null
+++ b/IModule.py
@@ -0,0 +1,8 @@
+class IModule(object):
+    """docstring for Module."""
+
+    def __init__(self):
+        super(IModule, self).__init__()
+
+    def getCommand(self):
+        raise NotImplementedError