[news.eclipse.modeling.gmf] add a figure in a gmf file programmatically

[bricelaurel@xxxxxxxxx (Brice Laurel)]

Hi list,

I do this tutorial 
http://www.ibm.com/developerworks/opensource/library/os-ecl-gmf/.
I save asdfasfdsaf.model_diagram on my file system. Now I want to add 
another Elliptical shape on my file programmatically. How I can do this ? 
then, when I open again my file, il must have three (instead of two) 
elliptical shapes and one rectangular shape.

Thanks in advance for your help.