Perform clean code of ui/org.eclipse.pde.ui

Author: eclipse-pde-bot

ui/org.eclipse.pde.ui/src/org/eclipse/pde/internal/ui/views/imagebrowser/repositories/AbstractRepository.java

@@ -45,7 +45,7 @@
 
 public abstract class AbstractRepository extends Job {
 
-	private SequencedMap<String, ImageElement> mElementsCache = new LinkedHashMap<>();
+	private final SequencedMap<String, ImageElement> mElementsCache = new LinkedHashMap<>();
 
 	private final IImageTarget mTarget;