Change default permission for log files

Hello,

I am trying to change the default permissions for log files created by Bonita on the server.

I'm speaking of all files in BONITA_HOME/server/logs
With a standard install, log files are created with rwxr-----
I want them to be rwxr--r-- (add read permission to all users)

In the file "BONITA_HOME/server/bin/catalina.sh", a script sets UMASK:

# Set UMASK unless it has been overridden
if [ -z "$UMASK" ]; then
    UMASK="0027"
fi
umask $UMASK

I tried to set the following code in "BONITA_HOME/server/bin/setenv.sh" :

UMASK="0022"
export UMASK

However, the file gets overwritten when restarting Bonita server.

Any idea how I can do this ?
Thanks,
FX