public LocalDataManager(String dataHome) throws WrongArgumentException
	{
		File dfile = new File(dataHome);
		if( dfile == null || !dfile.exists())
		{
			dfile.mkdir();
		}else if(dfile.exists()&&!dfile.isDirectory()){
			throw new WrongArgumentException("dataHome","Can not create Directory"+dataHome);
		}
		this.dataHome = dataHome;
	}