diff --git a/src/osmo_gsm_tester/bts_model.py b/src/osmo_gsm_tester/bts_model.py
new file mode 100644
index 0000000..e5f9682
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+++ b/src/osmo_gsm_tester/bts_model.py
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+# osmo_gsm_tester: bts model specifics
+#
+# Copyright (C) 2016-2017 by sysmocom - s.f.m.c. GmbH
+#
+# Author: Neels Hofmeyr <neels@hofmeyr.de>
+#
+# This program is free software: you can redistribute it and/or modify
+# it under the terms of the GNU Affero 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 Affero General Public License for more details.
+#
+# You should have received a copy of the GNU Affero General Public License
+# along with this program.  If not, see <http://www.gnu.org/licenses/>.
+
+from . import log, schema, util
+
+class TestContext(log.Origin):
+    '''
+    API to allow testing various BTS models.
+    '''
+
+    def __init__(self, 
+
+# vim: expandtab tabstop=4 shiftwidth=4