Bug 12188 Wrong Stylesheet Flag for Javadoc + impossible to deaktivate selection
javadoc: invalid flag: -stylsheet shouldbe: javadoc -stylesheetfile And it's im possible to deactivate the selecting of using the external Stylesheet.
org.eclipse.jdt.ui/ui/org/eclipse/jdt/internal/ui/javadocexport/JavadocOptionsManager.java
Object[] roots= fRoot.getProjects();
			for (int i= 0; i < roots.length; i++) {
				IProject p= (IProject) roots[i];
				IJavaProject iJavaProject= JavaCore.create(p);
				if (getValidProject(iJavaProject)) {
					fProject= iJavaProject;
					break;
				}
			}
		}
	}
	private IJavaElement getSelectableJavaElement(Object obj) {
		IJavaElement je= null;
		try {
			if (obj instanceof IAdaptable) {
				je= (IJavaElement) ((IAdaptable) obj).getAdapter(IJavaElement.class);
			}
			if (je == null) {
				return null;
			}
			switch (je.getElementType()) {
				case IJavaElement.JAVA_MODEL :
				case IJavaElement.JAVA_PROJECT :
				case IJavaElement.CLASS_FILE :
					break;
				case IJavaElement.PACKAGE_FRAGMENT_ROOT :
					if (containsCompilationUnits((IPackageFragmentRoot) je)) {
						return je;
					}
					break;