How to be generic when creating an XML for different suppliers

I try to explain my problem. I have a Order database. Each Order have orderlines. Each orderline has a product. These products can be ordered at different suppliers. Suppose we have this order:

ORDER
.......
Hamer 1x Supplier:supplier1
chair 1x Supplier:supplier1
door  1x Supplier:supplier8

So we have three orderlines which are ordered at two different suppliers, 1 and 8. Now supplier 1 and 8 can receive the orderline as XML. The difference is that the XML structure of 1 and 8 are both different. I am thinking about a tool to create which combines the orderlines when the supplier is the same and eventually sends the orderline(s) as an XML order to the supplier.

The way how I wanted to do this is like this:

So we have a order class and a supplier class:

When the code wants to create the xml it first creates the supplier object for example it creates an object for supplier1. Then it takes the elements and creates a XML from it. What I want to know, is this a correct way of doing this? Or are there also any design patterns for this?