The typical way to use the Clover plugin is by registering a Clover
report in your project.xml:
clover:report goal.
maven.clover.report.[report name]
properties. The generated reports show
exactly what lines of your code were exercised by your tests.
javac task will find its code compiled with Clover. This
is useful for example to Clover Cactus tests:
maven clover:on cactus.
javac compiler.
clover:report goal is called.
clover:multiproject goal.