diff --git a/src/app/project/game-model/gamesystems/ProductTemplateSystem.ts b/src/app/project/game-model/gamesystems/ProductTemplateSystem.ts
index 70a727a..6ae6b51 100644
--- a/src/app/project/game-model/gamesystems/ProductTemplateSystem.ts
+++ b/src/app/project/game-model/gamesystems/ProductTemplateSystem.ts
@@ -7,8 +7,9 @@ import {ProductGamesystemGenerator} from "./productSystemGenerator/ProductGamesy
 import {SimpleGamesystem} from "./SimpleGamesystem";
 import {GameModel} from "../GameModel";
 import {TemplateType} from "../TemplateType";
+import {TemplateGamesystem} from "./TemplateGamesystem";
 
-export class ProductTemplateSystem<ReferenceTemplate> extends ProductGamesystem {
+export class ProductTemplateSystem<ReferenceTemplate> extends ProductGamesystem implements TemplateGamesystem<ReferenceTemplate>{
 
   stateMap: Map<ReferenceTemplate, ProductState[]> = new Map<ReferenceTemplate, ProductState[]>();
   transitionMap: Map<ReferenceTemplate, ProductTransition[]> = new Map<ReferenceTemplate, ProductTransition[]>();
@@ -28,4 +29,8 @@ export class ProductTemplateSystem<ReferenceTemplate> extends ProductGamesystem
     const productSystemGenerator = new ProductTemplateGamesystemGenerator(this, referenceTemplate);
     productSystemGenerator.generateFromChildsystems()
   }
+
+  addReferenceKey(referenceTemplate: ReferenceTemplate): void {
+    this.generateTemplateFromChildsystems(referenceTemplate)
+  }
 }
diff --git a/src/app/project/game-model/gamesystems/SimpleTemplateGamesystem.ts b/src/app/project/game-model/gamesystems/SimpleTemplateGamesystem.ts
index 4d3cfa0..21119b5 100644
--- a/src/app/project/game-model/gamesystems/SimpleTemplateGamesystem.ts
+++ b/src/app/project/game-model/gamesystems/SimpleTemplateGamesystem.ts
@@ -3,8 +3,9 @@ import {Gamesystem} from "./Gamesystem";
 import {SimpleState} from "./states/SimpleState";
 import {SimpleTemplateTransition} from "./transitions/SimpleTemplateTransition";
 import {TemplateType} from "../TemplateType";
+import {TemplateGamesystem} from "./TemplateGamesystem";
 
-export class SimpleTemplateGamesystem<ReferenceType> extends Gamesystem<SimpleTemplateState<ReferenceType>, SimpleTemplateTransition<ReferenceType>> {
+export class SimpleTemplateGamesystem<ReferenceType> extends Gamesystem<SimpleTemplateState<ReferenceType>, SimpleTemplateTransition<ReferenceType>> implements TemplateGamesystem<ReferenceType>{
   createState(label: string, description: string): SimpleState | undefined {
     if(label == null) {
       return undefined;
diff --git a/src/app/project/game-model/gamesystems/TemplateGamesystem.ts b/src/app/project/game-model/gamesystems/TemplateGamesystem.ts
new file mode 100644
index 0000000..1b77e6b
--- /dev/null
+++ b/src/app/project/game-model/gamesystems/TemplateGamesystem.ts
@@ -0,0 +1,3 @@
+export interface TemplateGamesystem<ReferenceTemplate> {
+  addReferenceKey(referenceTemplate: ReferenceTemplate): void;
+}