how to store single device specific id on java(ee) server

I want to create some kind of grid of javaee applications. To identify each device i would generate an uuid on first start, but what is a good practice to store it?

i am using javaee 7 (wildfly) as platform. Is there probably a "native" javaee way or one specific to wildfly? I don't want to use database (jpa) for a single uuid. If there is a ways that don't need further configuration (set path, datasources, properties) it would be fine.

thanks in advance