instance now of type HenshinGenerationManager
diff --git a/org.eclipse.emf.refactor.metrics.henshin/src/org/eclipse/emf/refactor/metrics/henshin/managers/HenshinGenerationManager.java b/org.eclipse.emf.refactor.metrics.henshin/src/org/eclipse/emf/refactor/metrics/henshin/managers/HenshinGenerationManager.java
index 0a01822..a9bf7d2 100644
--- a/org.eclipse.emf.refactor.metrics.henshin/src/org/eclipse/emf/refactor/metrics/henshin/managers/HenshinGenerationManager.java
+++ b/org.eclipse.emf.refactor.metrics.henshin/src/org/eclipse/emf/refactor/metrics/henshin/managers/HenshinGenerationManager.java
@@ -19,6 +19,7 @@
 public class HenshinGenerationManager extends GenerationManager {
 	
 	private static final String HENSHIN_TEMPLATE_CLASS_NAME = "HenshinCalculateClassTemplate";
+	private static HenshinGenerationManager instance;
 	
 	private HenshinGenerationManager() {
 		templateDirectory = setTemplateDirectory();
@@ -30,7 +31,7 @@
 		if (instance == null) {
 			instance = new HenshinGenerationManager();
 		}
-		return (HenshinGenerationManager) instance;
+		return instance;
 	}
 	
 	protected List<IClasspathEntry> setClassPathEntries() {