<extension
		point="org.eclipse.papyrus.infra.core.model">
		<model
			classname="your.package.MyResource">
		</model>
	</extension>

public class MyResource extends AbstractBaseModel implements IModel{




	@Override
	public void loadModel(IPath fullPathWithoutExtension) {
		// do nothing
	}


	@Override
	public void createModel(IPath fullPath) {
          //do nothing
	}


	@Override
	public void saveModel() throws IOException {
           //do your stuff here
	}
}