diff --git a/OGP1718-Worms/src/worms/facade/Facade.java b/OGP1718-Worms/src/worms/facade/Facade.java
index b599179..e4f3671 100644
--- a/OGP1718-Worms/src/worms/facade/Facade.java
+++ b/OGP1718-Worms/src/worms/facade/Facade.java
@@ -1039,7 +1039,8 @@ public class Facade implements IFacade {
      */
     @Override
     public void loadProgramOnWorm(Worm worm, Program program, IActionHandler actionHandler) throws ModelException {
-
+        actionHandler.toString();
+        program.toString();
     }
 
     /**
diff --git a/OGP1718-Worms/src/worms/programs/ProgramFactory.java b/OGP1718-Worms/src/worms/programs/ProgramFactory.java
index 31348da..0026cee 100644
--- a/OGP1718-Worms/src/worms/programs/ProgramFactory.java
+++ b/OGP1718-Worms/src/worms/programs/ProgramFactory.java
@@ -212,7 +212,12 @@ public class ProgramFactory implements IProgramFactory<Expression, Statement, Pr
      */
     @Override
     public Expression createDoubleLiteralExpression(double value, SourceLocation location) throws ModelException {
-        return () -> value;
+        return new Expression() {
+            @Override
+            public Object execute() {
+                return value;
+            }
+        };
     }
 
     /**
@@ -223,7 +228,12 @@ public class ProgramFactory implements IProgramFactory<Expression, Statement, Pr
      */
     @Override
     public Expression createBooleanLiteralExpression(boolean value, SourceLocation location) throws ModelException {
-        return () -> value;
+        return new Expression() {
+            @Override
+            public Object execute() {
+                return value;
+            }
+        };
     }
 
     /**
@@ -233,7 +243,12 @@ public class ProgramFactory implements IProgramFactory<Expression, Statement, Pr
      */
     @Override
     public Expression createNullExpression(SourceLocation location) throws ModelException {
-        return () -> null;
+        return new Expression() {
+            @Override
+            public Object execute() {
+                return null;
+            }
+        };
     }
 
     /**