What design patter or OOP design for this use case (scanning folder and conditionaly overwrite files)

I need to conceptually design a system that

1. to scan directories looking for specific files (xml files that has a specific name)
2. to parse these files and look for some nodes/attributes, output these values in a csv file
3. ot overwrite some of this file that match with some criteria

how to design/structure this use case accordingly the OOP best practices or some suitable design pattern?