List<IContributionItem> list = new ArrayList<IContributionItem>();
if (classes.size() > 0)
{
// Add an action to open all selected classes
IEditorDescriptor jdtClassViewer = registry
.findEditor(Startup.JDT_EDITOR_ID);
IEditorDescriptor jdRealignClassViewer = registry
.findEditor(Startup.EDITOR_ID);
list.add(new ActionContributionItem(new OpenClassesAction(jdtClassViewer.getLabel(),
jdRealignClassViewer, classes)));