This class allow us to extract only the data from the file that matches a given pattern, which in this case is for phone numbers.

However, we can enhance this class by making it abstract. This class will implement an abstract method that will be filled in by subclasses depending on the type of data required to be reported (phone numbers, emails, names, etc.). This approach is a much better implementation because it:

• Avoid code duplication
• Increases resusability
• Encapsulate a common functionality in one place
• Let subclasses implement specific body methods for their purposes

To see that implementation change to branch abstract