Fix return val and hardcoded None

version.py

@@ -3,8 +3,8 @@ from file_handlers import FileHandler
 
 class Version():
 
-    def __init__(self, version_list, release_type):
-        self.version_list = None
+    def __init__(self, version_list: list):
+        self.version_list = version_list
         self.version_string = None
         self.is_snapshot = None        
 
@@ -30,6 +30,7 @@ class Version():
         self.version_string = ".".join([str(x) for x in self.version_list])
         if self.is_snapshot:
             self.version_string += "-SNAPSHOT"
+        return self.version_string
 
     @classmethod
     def create_release_version(cls, version_list, release_type):