Bug 53201 NPE when re-running newly generated javadoc.xml
org.eclipse.jdt.ui/ui/org/eclipse/jdt/internal/ui/javadocexport/JavadocOptionsManager.java
fInitialElements= getInitialElementsFromSelection(sel);
		
		IJavaProject project= getSingleProjectFromInitialSelection();
		fAccess= settings.get(VISIBILITY);
		if (fAccess == null)
			fAccess= PROTECTED;
		
		fFromStandard= settings.getBoolean(FROMSTANDARD);
		
		fDocletpath= settings.get(DOCLETPATH);
		fDocletname= settings.get(DOCLETNAME);
		if (fDocletpath == null || fDocletname == null) {
			fFromStandard= true;
			fDocletpath= ""; 
			fDocletname= ""; 
		}
		
		if (project != null) {
			fAntpath= getRecentSettings().getAntpath(project);
		} else {
			fAntpath= settings.get(ANTPATH);
			if (fAntpath == null) {
				fAntpath= ""; 
			}
		}
		
		if (project != null) {
			fDestination= getRecentSettings().getDestination(project);
		} else {
			fDestination= settings.get(DESTINATION);