diff --git a/fimfarchive/commands/__init__.py b/fimfarchive/commands/__init__.py
new file mode 100644
index 0000000..415ed5e
--- /dev/null
+++ b/fimfarchive/commands/__init__.py
@@ -0,0 +1,30 @@
+"""
+Command module.
+"""
+
+
+#
+# Fimfarchive, preserves stories from Fimfiction.
+# Copyright (C) 2015  Joakim Soderlund
+#
+# This program 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.
+#
+# This program 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 this program.  If not, see <http://www.gnu.org/licenses/>.
+#
+
+
+from .base import Command
+
+
+__all__ = (
+    'Command',
+)
diff --git a/fimfarchive/commands/base.py b/fimfarchive/commands/base.py
new file mode 100644
index 0000000..1d35f66
--- /dev/null
+++ b/fimfarchive/commands/base.py
@@ -0,0 +1,51 @@
+"""
+Command base class.
+"""
+
+
+#
+# Fimfarchive, preserves stories from Fimfiction.
+# Copyright (C) 2015  Joakim Soderlund
+#
+# This program 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.
+#
+# This program 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 this program.  If not, see <http://www.gnu.org/licenses/>.
+#
+
+
+from abc import ABC, abstractmethod
+
+
+__all__ = (
+    'Command',
+)
+
+
+class Command(ABC):
+    """
+    Command line interface for tasks.
+    """
+
+    @abstractmethod
+    def __call__(self, *args: str) -> int:
+        """
+        Runs the command.
+
+        Args:
+            *args: Command line arguments.
+
+        Returns:
+            Application exit status.
+
+        Raises:
+            SystemExit: If the arguments are invalid.
+        """
diff --git a/tests/test_imports.py b/tests/test_imports.py
index 051b67c..7501661 100644
--- a/tests/test_imports.py
+++ b/tests/test_imports.py
@@ -26,6 +26,7 @@ import pytest
 
 
 MODULES = (
+    'commands',
     'exceptions',
     'fetchers',
     'flavors',