Bug 174272 FileStoreEditorInput needs to be restorable
3.3 M5 The FileStoreEditorInput needs to restorable on startup. Therefore it needs to return an IPersistableElement and there needs to be an element factory.
bundles/org.eclipse.ui.ide/src/org/eclipse/ui/ide/IDE.java
/**
		 * A named preference for how a new perspective should be opened when a
		 * new project is created.
		 * <p>
		 * Value is of type <code>String</code>. The possible values are