http://cobertura.sourceforge.net: Cobertura is a free Java tool that calculates the percentage of code accessed by tests. It can be used to identify which parts of your Java program are lacking test coverage. It is based on jcoverage.
  • Steven Christou 
package net.sourceforge.cobertura.reporting;

import net.sourceforge.cobertura.dsl.ReportFormat;

public class NullReport implements Report {

	public void export(ReportFormat reportFormat) {
		//no action performed
	}

	public ReportName getName() {
		return ReportName.NULL_REPORT;
	}

	public Report getByName(ReportName name) {
		return this;
	}
}