serialio How to close port?

Hello Guys and gals,
I am trying to use the Java Serialio created by Eker676.
I have down loaded the Serialio library and used the supplied code. Everything works as expected.... but how do you close the port.
The program is great and doing everything i wanted... but i need to close the port and there appears to be no way of doing it..
http://www.dreamincode.net/forums/blog/664/entry-3158-java-serial-port-communications-library/

thanks...