Merge pull request #42 from arturobernalg/feature/javadoc

Complete javadoc
diff --git a/src/main/java/org/apache/commons/release/plugin/mojos/CommonsDistributionStagingMojo.java b/src/main/java/org/apache/commons/release/plugin/mojos/CommonsDistributionStagingMojo.java
index 8e6095a..7c16e9e 100755
--- a/src/main/java/org/apache/commons/release/plugin/mojos/CommonsDistributionStagingMojo.java
+++ b/src/main/java/org/apache/commons/release/plugin/mojos/CommonsDistributionStagingMojo.java
@@ -380,7 +380,7 @@
      * <code>${basedir}/target/commons-release-plugin/scm/signature-validator.sh</code>.
      *
      * @return the {@link File} for the signature-validator.sh
-     * @throws MojoExecutionException
+     * @throws MojoExecutionException if an error occurs while the resource is being copied
      */
     private File copySignatureValidatorScriptToScmDirectory() throws MojoExecutionException {
         final Path scmTargetPath = Paths.get(distRcVersionDirectory.toString(), SIGNATURE_VALIDATOR_NAME);