$5.$ Create an EncryptionMethod interface as outlined above.

$6.$ Refactor the CaesarCipher and XORCipher classes to inherit from the EncryptionMethod interface.

$7.$ Implement an Encryption class that has an encryptFile$()$ and decryptFile$()$ method. Each method should take an input Path, output Path and an EncryptionMethod argument.

$8.$ Create appropriate tests for the CaesarCipher, XORCipher and Encryption classes.

a$.$ When testing the CaesarCipher and XORCipher classes, the JUnit assertArrayEquals$()$ assertion will be helpful.

b$.$ When testing the Encryption class you can encrypt the project$$s pom.xml file creating a pom.xml$.$cipher file with the encrypted results. Then decrypt pom.xml$.$cipher into pom.xml$.$clear. Finally compare pom.xml to pom.xml$.$cipher byte$-$by$-$byte to make sure that most bytes are different. Then compare pom.xml to pom.xml$.$clear to make sure that they are identical.