Bug 25246 filecomment template does not accept '//' comments [wizards]
org.eclipse.jdt.ui/ui/org/eclipse/jdt/ui/wizards/NewTypeWizardPage.java
StatusInfo status= new StatusInfo();
		
		IPackageFragmentRoot root= getPackageFragmentRoot();
		fSuperInterfacesDialogField.enableButton(0, root != null);
						
		if (root != null) {
			List elements= fSuperInterfacesDialogField.getElements();
			int nElements= elements.size();
			for (int i= 0; i < nElements; i++) {
				String intfname= (String)elements.get(i);
				try {
					IType type= root.getJavaProject().findType(intfname);
					if (type == null) {
						status.setWarning(NewWizardMessages.getFormattedString("NewTypeWizardPage.warning.InterfaceNotExists", intfname)); 
						return status;
					} else {
						if (type.isClass()) {
							status.setWarning(NewWizardMessages.getFormattedString("NewTypeWizardPage.warning.InterfaceIsNotInterface", intfname)); 
							return status;
						}
						if (!JavaModelUtil.isVisible(type, getPackageFragment())) {
							status.setWarning(NewWizardMessages.getFormattedString("NewTypeWizardPage.warning.InterfaceIsNotVisible", intfname)); 
							return status;
						}
					}
				} catch (JavaModelException e) {
					JavaPlugin.log(e);
					
				}					
			}