Follow up from previous two commits

stt_voice_messages/models/model_template.py

@@ -0,0 +1,32 @@
+# This file is part of Gajim.
+#
+# Gajim 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.
+#
+# Gajim 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 Gajim. If not, see <http://www.gnu.org/licenses/>.
+
+from abc import ABC, abstractmethod
+from pathlib import Path
+
+from gajim.gtk.const import Setting
+
+from ..helper import Results
+
+
+class Model(ABC):
+
+    @abstractmethod
+    def transcribe(self, result: Results, audio_file: Path) -> str:
+        return ''
+
+    @abstractmethod
+    def on_setting(self, setting: Setting):
+        pass