Implement required methods

Author: mvdbeek

planemo/database/postgres_singularity.py

@@ -1,6 +1,7 @@
 """Module describes a :class:`DatabaseSource` for managed, dockerized postgres databases."""
 
 import os
+import shutil
 import time
 from tempfile import mkdtemp
 from typing import Optional
@@ -94,6 +95,13 @@ def __init__(self, profile_directory: Optional[str] = None, **kwds):
         self._kwds = kwds
         self.running_process = None
 
+    def create_database(self, identifier):
+        # Not needed, we'll create the database automatically when the container starts.
+        pass
+
+    def delete_database(self, identifier):
+        shutil.rmtree(self.database_location, ignore_errors=True)
+
     def __enter__(self):
         self.running_process = start_postgres_singularity(
             singularity_path=self.singularity_path,