The following 3rd libraries are reqired for automated GUI testing. 
(They are NOT necessary to run RNAstructureUI)

These can all obtained from the 'lib' folder in the Abbot 1.3.0 distribution http://abbot.sourceforge.net/doc/overview.shtml
You can automate the process of obtaining these file by running "make abbot" from the java_interface folder, or by running "bash get-abbot"

abbot.jar  (Version 1.3.0)
gnu-regexp-1.1.4.jar
jdom-1.1.1.jar
junit-4.8.2.jar
