if (wc != null) wc.destroy();
	public RefactoringStatus checkInput(IProgressMonitor pm) throws JavaModelException {		try{			pm.beginTask(RefactoringCoreMessages.getString("ExtractTempRefactoring.checking_preconditions"), 1); //$NON-NLS-1$			RefactoringStatus result= new RefactoringStatus();			result.merge(checkTempName(fTempName));			return result;		} finally{			pm.done();		}		}