@pskowronek functionality wise, it was good but I've posted another commit to replace the method with FileterInputSream and replaced the AtomicBoolean with an array, what do you think?

I saw it :)

• FileterInputSream - good
• AtomicBoolean -> array - a matter of taste I would say (I prefer AtomicBoolean way)
• inline override FileterInputSream directly inside startEditing method - again a matter of taste (I like doing that via additional method to have cleaner code)

But overall, it is OK

BTW, I cannot approve as github forbids me to approve 'my own PR' :)

yeah, I'm aware of that, that's ok :)
and I've replaced the boolean array with AtomicBoolean, I wasn't sure if I like that as well..