diff --git a/Sources/Model/Dice/DieManager.cs b/Sources/Model/Dice/DieManager.cs
index 06e3a52..71654cf 100644
--- a/Sources/Model/Dice/DieManager.cs
+++ b/Sources/Model/Dice/DieManager.cs
@@ -21,6 +21,11 @@ namespace Model.Dice
             return diceGroups.AsEnumerable();
         }
 
+        public KeyValuePair<string, IEnumerable<AbstractDie<AbstractDieFace>>> GetOneByID(Guid ID)
+        {
+            throw new NotImplementedException();
+        }
+
         public KeyValuePair<string, IEnumerable<AbstractDie<AbstractDieFace>>> GetOneByName(string name)
         {
             // les groupes de dés nommés :
diff --git a/Sources/Model/Games/GameRunner.cs b/Sources/Model/Games/GameRunner.cs
index eb24f80..d58085e 100644
--- a/Sources/Model/Games/GameRunner.cs
+++ b/Sources/Model/Games/GameRunner.cs
@@ -108,5 +108,10 @@ namespace Model.Games
             game.PerformTurn(current);
             game.PrepareNextPlayer(current);
         }
+
+        public Game GetOneByID(Guid ID)
+        {
+            throw new NotImplementedException();
+        }
     }
 }
diff --git a/Sources/Model/IManager.cs b/Sources/Model/IManager.cs
index 67eafe0..8261ffa 100644
--- a/Sources/Model/IManager.cs
+++ b/Sources/Model/IManager.cs
@@ -1,10 +1,12 @@
-using System.Collections.Generic;
+using System;
+using System.Collections.Generic;
 namespace Model
 {
     public interface IManager<T>
     {
         public T Add(T toAdd);
         public T GetOneByName(string name);
+        public T GetOneByID(Guid ID);
         public IEnumerable<T> GetAll();
         public T Update(T before, T after);
         public void Remove(T toRemove);
diff --git a/Sources/Model/Players/PlayerManager.cs b/Sources/Model/Players/PlayerManager.cs
index aa4db9b..1b65565 100644
--- a/Sources/Model/Players/PlayerManager.cs
+++ b/Sources/Model/Players/PlayerManager.cs
@@ -95,5 +95,10 @@ namespace Model.Players
             // the built-in Remove() method will use our redefined Equals(), using Name only
             players.Remove(toRemove);
         }
+
+        public Player GetOneByID(Guid ID)
+        {
+            throw new NotImplementedException();
+        }
     }
 }