diff --git a/plugins-compat-tester/src/main/java/org/jenkins/tools/test/maven/ExternalMavenRunner.java b/plugins-compat-tester/src/main/java/org/jenkins/tools/test/maven/ExternalMavenRunner.java
index 07d6c5e84..0babb7c3b 100644
--- a/plugins-compat-tester/src/main/java/org/jenkins/tools/test/maven/ExternalMavenRunner.java
+++ b/plugins-compat-tester/src/main/java/org/jenkins/tools/test/maven/ExternalMavenRunner.java
@@ -17,13 +17,16 @@
 
 import javax.annotation.CheckForNull;
 
+/**
+ * Runs external Maven executable.
+ */
 public class ExternalMavenRunner implements MavenRunner {
 
     @CheckForNull
     private File mvn;
 
     /**
-     *
+     * Constructor.
      * @param mvn Path to Maven.
      *            If {@code null}, a default Maven executable from {@code PATH} will be used
      */