I would be nice, if OWB supports Java 1.5, e. g. to run with WebSphere 6.1.
It can be implemented with low effort.
There is one basic dependency to Java 1.6: java.util.ServiceLoader
To solve this problem, I've added a utility class in my local copy and delegate calls to ServiceLoader to this utility.
The utility class itself calls ServiceLoader, if the class is available (Java 1.6) or uses com.googlecode.bspi.ServiceLoader (Java 1.5).
So the application needs one new dependency (only in the case of Java 1.5).
I've also changed the maven-compiler-plugin to generate Java 1.5 compatible byte code.