private HashMap<String, File> putFileAndItsName(File folder){
		HashMap<String, File> resultMap = new HashMap<String, File>();
		File[] fileList = folder.listFiles();
		if(fileList!=null){
		for(File f:fileList){
			if(f.isFile()){
				resultMap.put(getFileNameWithoutExtension(f),f );
			}
			}		
		}
		return resultMap;
	}