Interface initialized. Using SWT, with windowbuilder. SWT appeared to be
better than Swing using Eclipse.
Packages Connection and Network created (-->
classdia.class.violet.html).

windowbuilder: http://www.eclipse.org/windowbuilder/  
SWT:
http://wiki.eclipse.org/FAQ_How_do_I_configure_an_Eclipse_Java_project_to_use_SWT%3F

SWT already added to .classpath