File list (Check if you may need any files):
gef.tutorial.step2\.classpath
..................\.project
..................\build.properties
..................\plugin.xml
..................\.settings\org.eclipse.jdt.core.prefs
..................\META-INF\MANIFEST.MF
..................\src\gef\tutorial\step\Activator.java
..................\...\...\........\....\Application.java
..................\...\...\........\....\ApplicationActionBarAdvisor.java
..................\...\...\........\....\ApplicationWorkbenchAdvisor.java
..................\...\...\........\....\ApplicationWorkbenchWindowAdvisor.java
..................\...\...\........\....\Perspective.java
..................\...\...\........\....\actions\DiagramAction.java
..................\...\...\........\....\model\ContentsModel.java
..................\...\...\........\....\.....\HelloModel.java
..................\...\...\........\....\parts\ContentsEditPart.java
..................\...\...\........\....\.....\HelloEditPart.java
..................\...\...\........\....\.....\PartFactory.java
..................\...\...\........\....\ui\DiagramEditor.java
..................\...\...\........\....\..\DiagramEditorInput.java
..................\...\...\........\....\..\GraphicalEditor.java