How to create a customised XML document using smooks?

I want to convert an object graph to a XMl document using smooks. However I don't want tight coupling with the object graph and the generating xml structure so I need to have a mapping file or want to use annotations. The java to xml example given in the smooks documentation is really limited and I can't find a proper way to do this.

This is my object structure ;

Parent Class { --------> <Root>
   ParentFieldOne;  ---> <SomeFieldOne>
   ParentFieldTwo;  ----> <SomeFieldTwo> 
   List<ChildObject> ----> <Dependents>
}

ChildClass { ----> <Child>
   ChildFieldOne; ---> <SomeChildFieldOne>
   ChildFieldTwo; ---> <SomeChildFieldTwo>
}

So the resulting XMl would be like this;

<Root>
  <SomeFieldOne></SomeFieldOne>
  <SomeFieldTwo></<SomeFieldTwo>
  <Dependents>
    <Child>
      <SomeChildFieldOne></SomeChildFieldOne>
      <SomeChildFieldTwo></SomeChildFieldTwo>
     </Child>
  </Dependents>
</Root>

PS : I don't want to use freemarker thought this is possible using it. I guess using a template mechanism for a task like this would be inefficient.