</executions>
				<configuration>
					<failOnError>false</failOnError>
					<ignored>
						<difference>
							<!-- seems to be a clirr bug that it cannot handle the different inherited 
								return types -->
							<className>**</className>
							<differenceType>7006</differenceType>
							<method>*</method>
							<from>*</from>
							<to>*</to>
						</difference>
						<difference>

              <exclude>org.apache.maven.toolchain.DefaultToolchain#getLog():METHOD_RETURN_TYPE_CHANGED</exclude>
              <exclude>org.apache.maven.toolchain.DefaultToolchain#DefaultToolchain(org.apache.maven.toolchain.model.ToolchainModel,org.codehaus.plexus.logging.Logger):CONSTRUCTOR_REMOVED</exclude>