How to build a custom draw2d layoutmanager?

Question

I would like to have a layout manager that can arrange two elements as follows:

• one main element ABCDEF centered

• one "postscript" element XYZ, positioned on the top right corner of the encapsulating figure

For example:

***********XYZ*
*   ABCDEF    *
***************

Can I use an existing layoutmanager for this? How do I build a custom layout manager that supports it?

Many thanks for your advice.