Attempted to justify nasty package protection.

git-svn-id: https://svn.apache.org/repos/asf/maven/shared/trunk@576969 13f79535-47bb-0310-9956-ffa450edef68
diff --git a/src/main/java/org/apache/maven/shared/dependency/tree/DependencyTreeResolutionListener.java b/src/main/java/org/apache/maven/shared/dependency/tree/DependencyTreeResolutionListener.java
index 3da8e1f..642378c 100644
--- a/src/main/java/org/apache/maven/shared/dependency/tree/DependencyTreeResolutionListener.java
+++ b/src/main/java/org/apache/maven/shared/dependency/tree/DependencyTreeResolutionListener.java
@@ -435,6 +435,7 @@
      *            the attached artifact for the new dependency node
      * @return the new dependency node
      */
+    // package protected for unit test
     DependencyNode addNode( Artifact artifact )
     {
         DependencyNode node = createNode( artifact );