Since sbws migth be run as a system service, it should give some
information to the system log.
There are no new options to configure for the user, and it's
disabled by default.

and call it from object instance, otherwise generate would fail.
write method should not be a classinstance since a Class won't
have useful information to write, and can't be an static method
since it requires an argument.

and add a simple first sentence about what this program does.

GH: ref #201