Update db.py

db.py

@@ -10,9 +10,19 @@ class db_module():
     def __init__(self):
         super().__init__()
         self.dbCredential: credentials.DB_Credential
+        self.currentDBStrategy: config.DBStrategy
+        self.Strategy = None
         self.currentWorkingDB: str
         self.engine = None
 
+    class Strategy_SQLite():
+        def __init__(self):
+            pass
+
+    class Strategy_MySQL():
+        def __init__(self):
+            pass
+
     def setup_engine(self, credential: credentials.DB_Credential = None):
         createEngine = True
         if credential is None: