diff --git a/AlgebraicDataflowArchitectureModel/src/application/views/FlowLayerWindow.java b/AlgebraicDataflowArchitectureModel/src/application/views/FlowLayerWindow.java
index 23c730b..2990204 100644
--- a/AlgebraicDataflowArchitectureModel/src/application/views/FlowLayerWindow.java
+++ b/AlgebraicDataflowArchitectureModel/src/application/views/FlowLayerWindow.java
@@ -11,12 +11,12 @@
 import java.awt.event.ActionListener;
 
 public class FlowLayerWindow extends JDialog implements IStageChangeListener {
-	private String title = "Flow Layer";
-	private JCheckBox dataFlowCheckBox = null;
-	private JCheckBox pushFlowCheckBox = null;
-	private JCheckBox pullFlowCheckBox = null;
+	private final String title = "Flow Layer";
+	private final JCheckBox dataFlowCheckBox;
+	private final JCheckBox pushFlowCheckBox;
+	private final JCheckBox pullFlowCheckBox;
 	
-	private Stage stage = null;
+	private final Stage stage;
 	
 	public FlowLayerWindow(final ApplicationWindow owner) {
 		super(owner);