add debug info on site descriptor inheritance

git-svn-id: https://svn.apache.org/repos/asf/maven/doxia/doxia-tools/trunk@1704162 13f79535-47bb-0310-9956-ffa450edef68
diff --git a/doxia-integration-tools/src/main/java/org/apache/maven/doxia/tools/DefaultSiteTool.java b/doxia-integration-tools/src/main/java/org/apache/maven/doxia/tools/DefaultSiteTool.java
index 0b57430..45e33c7 100644
--- a/doxia-integration-tools/src/main/java/org/apache/maven/doxia/tools/DefaultSiteTool.java
+++ b/doxia-integration-tools/src/main/java/org/apache/maven/doxia/tools/DefaultSiteTool.java
@@ -1111,6 +1111,11 @@
             // Merge the parent and child site descriptors
             String projectDistMgmnt = getDistMgmntSiteUrl( project );
             String parentDistMgmnt = getDistMgmntSiteUrl( parentProject );
+            if ( getLogger().isDebugEnabled() )
+            {
+                getLogger().debug( "model inheritance distributionManagement.site.url child = " + projectDistMgmnt
+                    + ", parent = " + parentDistMgmnt );
+            }
             assembler.assembleModelInheritance( name, decoration, parent, projectDistMgmnt,
                                                 parentDistMgmnt == null ? projectDistMgmnt : parentDistMgmnt );
         }