added attributes to GraphML export

src/main/java/kieker/analysis/graph/export/graphml/GraphTypeTransformer.java

@@ -45,6 +45,7 @@ public class GraphTypeTransformer extends AbstractTransformer<GraphType> {
 		edgeType.setId(edge.getId().toString());
 		edgeType.setSource(edge.getVertex(Direction.OUT).getId().toString());
 		edgeType.setTarget(edge.getVertex(Direction.IN).getId().toString());
+
 		// TODO Map Properties
 		graphType.getDataOrNodeOrEdge().add(edgeType);
 	}