diff --git a/AlgebraicDataflowArchitectureModel/src/application/actions/AbstractPopupAction.java b/AlgebraicDataflowArchitectureModel/src/application/actions/AbstractPopupAction.java
index 95eb4c6..e595801 100644
--- a/AlgebraicDataflowArchitectureModel/src/application/actions/AbstractPopupAction.java
+++ b/AlgebraicDataflowArchitectureModel/src/application/actions/AbstractPopupAction.java
@@ -7,8 +7,8 @@
 import java.awt.event.ActionEvent;
 
 public abstract class AbstractPopupAction extends AbstractAction {
-	protected mxGraphComponent graphComponent = null;
-	protected mxCell targetCell = null;
+	protected mxGraphComponent graphComponent;
+	protected mxCell targetCell;
 	
 	public AbstractPopupAction(final String propName, final mxCell targetCell, final mxGraphComponent graphComponent) {
 		super(propName);