public static File createFolder(String currentDir, String folderName)
	{
		if (currentDir == null)
			return null;
		
		File newFolder = new File (currentDir + File.separator + folderName);
		
		if (newFolder.exists ())
			return null;
		
		if (newFolder.mkdir ())
			return newFolder;
		
		return null;
	}