Added __init__ to Message Builder interface

reginaldCog/messenger_clients/messenger_client.py

@@ -17,6 +17,10 @@ class ClientMessage(IClientMessage):
 
 
 class IMessageBuilder(ABC):
+    @abstractmethod
+    def __init__(self, raw_message: object):
+        self.raw_message = raw_message
+        self.message: IClientMessage = None
 
     def create_message(self) -> ClientMessage:
         self.set_content() \