Xpp3Dom metadata = new Xpp3Dom( "metadata" );
addChild( metadata, "groupId", artifact.getGroupId() );
addChild( metadata, "artifactId", artifact.getArtifactId() );
addChild( metadata, "version", artifact.getBaseVersion() );
Xpp3Dom versioning = new Xpp3Dom( "versioning" );
versioning.addChild( addChild( new Xpp3Dom( "snapshot" ), "localCopy", "true" ) );
addChild( versioning, "lastUpdated", timestamp );
metadata.addChild( versioning );
writeMetadata( metadataFile, metadata );
}