Perform clean code of bundles/org.eclipse.e4.ui.workbench.renderers.swt

Author: eclipse-platform-bot

bundles/org.eclipse.e4.ui.workbench.renderers.swt/src/org/eclipse/e4/ui/workbench/renderers/swt/CSSEngineHelper.java

@@ -25,8 +25,8 @@
  * used by renderers.
  */
 public class CSSEngineHelper {
-	private IEclipseContext context;
-	private Control control;
+	private final IEclipseContext context;
+	private final Control control;
 	private IStylingEngine engine;
 	private CSSStyleDeclaration style;