for new class / project : only declare property as public attributes
public class MyDataObj {
public String propA;
public int propB;
}
for existing code , you could keep the code "as is", or convert the code :
change the scope of attribute from private to public
drop trivial getter and setter (basic access)
replace caller access via method by direct access to field, (install) compilation of project could help identified callers
If your project use libraries need getters and setter, then install GetAndSetAdder as post-compiler.
If you want to add behavior when accessing property (or replace less trivial getters/setters), then you need to integrate an AOP tool (like AspectJ) into your project and create the aspectj that do the wanted behavior (We'll start to create a catalogue of Aspect for the common use case, (help welcome)).