Do not store property files in the current working directory

When starting ClassyShark it creates two property files in the current working directory:

# mkdir test
# cd test
# java -jar ClassyShark.jar

Afterwards there are two property file in the workint directory 'test':

-rw-r--r-- 1 foo bar    0 Jul 25 11:08 classyshark_recents.properties
-rw-r--r-- 1 foo bar    0 Jul 25 11:08 classyshark_ui.properties

Instead these could be stored in ~/.classyshark or similar?