how to apply dozer converter at global level

Question

Is there a way to apply the custom converter at global level for all classes.

I am trying to avoid to have every class specified in the mapping.xml file. I want some thing like this

<mapping map-null="false">
    <class-a>*</class-a>
    <class-b>*</class-b>  
</mapping>  

I found the answer by myself

<configuration> 
 <map-null>false</map-null> 
</configuration>