refactor for sprint

transport/connection/raw_connection.py

@@ -0,0 +1,16 @@
+import asyncio
+from .raw_connection_interface import IRawConnection
+
+class RawConnection(IRawConnection):
+
+    def __init__(self, ip, port):
+        self.conn_ip = ip
+        self.conn_port = port
+        self.reader, self.writer = self.open_connection()
+
+    async def open_connection(self):
+        """
+        opens a connection on self.ip and self.port
+        :return: a raw connection
+        """
+        return await asyncio.open_connection(self.conn_ip, self.conn_port)

transport/connection/raw_connection_interface.py

@@ -0,0 +1,15 @@
+from abc import ABC, abstractmethod
+
+class IRawConnection(ABC):
+    """
+    A Raw Connection provides a Reader and a Writer
+    open_connection should return such a connection
+    """
+
+    @abstractmethod
+    async def open_connection(self):
+        """
+        opens a connection on ip and port
+        :return: a raw connection
+        """
+        pass