diff --git a/Class_Diagram.md b/Class_Diagram.md
index 1a79e93..c2ee5da 100644
--- a/Class_Diagram.md
+++ b/Class_Diagram.md
@@ -187,9 +187,8 @@ package Model <<Frame>> #bada55 {
   abstract class AbstractDie
   abstract class AbstractDieFace
   class Player
-  interface IManager
   
-  interface IManager<Game> $done {
+  interface IManager<T> $done {
     +Add(toAdd: T): T
     +GetAll(): T[*]
     +GetOneByName(name: string): T
@@ -199,7 +198,7 @@ package Model <<Frame>> #bada55 {
   
   package Games #daf {
   
-    class GameRunner $inprogress {
+    class GameRunner : IManager<Game> $inprogress {
       -globalPlayerManager: IManager
       -globalDieManager: IManager
       {static} +PlayGame(game: Game)
@@ -245,7 +244,7 @@ Turn --> "/+Player" Player
 GameRunner --> "[*] -games" Game
 GameRunner -left-> IManager
 GameRunner -up-> IManager
-GameRunner-up-|> IManager<Game>
+GameRunner-up-|> IManager
 
 Game --> "[*]" AbstractDie
 Game --> "[*] /+Turns" Turn