GitHub #326: Document defaults for check goal.
diff --git a/jacoco-maven-plugin/src/org/jacoco/maven/CheckMojo.java b/jacoco-maven-plugin/src/org/jacoco/maven/CheckMojo.java
index 8cae945..10ec9eb 100644
--- a/jacoco-maven-plugin/src/org/jacoco/maven/CheckMojo.java
+++ b/jacoco-maven-plugin/src/org/jacoco/maven/CheckMojo.java
@@ -54,7 +54,19 @@
* If a limit refers to a ratio the range is from 0.0 to 1.0 where the
* number of decimal places will also determine the precision in error
* messages.
+ * </p>
*
+ * <p>
+ * If not specified the following defaults are assumed:
+ * </p>
+ *
+ * <ul>
+ * <li>rule element: BUNDLE</li>
+ * <li>limit counter: INSTRUCTION</li>
+ * <li>limit value: COVEREDRATIO</li>
+ * </ul>
+ *
+ * <p>
* Note that you <b>must</b> use <tt>implementation</tt> hints for
* <tt>rule</tt> and <tt>limit</tt> when using Maven 2, with Maven 3 you do
* not need to specify the attributes.
