This is trivial project for appending header to specific files from given directory.
Function 'get_files_from_directory' selects all files with particular extensions from given directory, excluded files from directories on blacklist. Then all found files are rewritten with defined header. All parameters are defined explicit in source code, there is no parsing of program's arguments implemented.
Everyone who wants add header for some files. :) Project is distributed under MIT license.
This project was designed for quick update license information in files in my repository. I've treated it as an simple programming exercise.