add remove attachments event
add sha256 util

add sha256 util
change attachments naming strategy from UUID to sha256

change attachments naming strategy from UUID to sha256
remove unused test

remove unused test
add hash generator test

add hash generator test
don't write file if already exists

don't write file if already exists
add attachment save and delete test

add attachment save and delete test
use Guava to get files sha256

use Guava to get files sha256
add DirectoryContains matcher

add DirectoryContains matcher
add attachments to remove regex

add attachments to remove regex config
add remove attachment event test

add remove attachment event test
fix populate results properties
use newInstance
use Guava to hashing

remove lolwaht

rename test method

use type safe matcher

remove unused import

remove utf8 constant

add static imports

remove unused imports