diff --git a/src/org/ntlab/deltaViewer/DeltaObjectCallGraph.java b/src/org/ntlab/deltaViewer/DeltaObjectCallGraph.java
new file mode 100644
index 0000000..4a66ec4
--- /dev/null
+++ b/src/org/ntlab/deltaViewer/DeltaObjectCallGraph.java
@@ -0,0 +1,30 @@
+package org.ntlab.deltaViewer;
+
+import java.util.ArrayList;
+import java.util.List;
+
+import org.ntlab.deltaExtractor.ExtractedStructure;
+import org.ntlab.trace.MethodExecution;
+import org.ntlab.trace.Reference;
+
+public class DeltaObjectCallGraph implements IObjectCallGraph {
+	private List<Reference> references = new ArrayList<>();
+	private List<MethodExecution> startPoints = new ArrayList<>();
+	
+	public DeltaObjectCallGraph(ExtractedStructure e) {
+		references.addAll(e.getDelta().getSrcSide());
+		references.addAll(e.getDelta().getDstSide());
+		startPoints.add(e.getCoordinator());
+	}
+
+	@Override
+	public List<Reference> getReferences() {
+		return references;
+	}
+
+	@Override
+	public List<MethodExecution> getStartPoints() {
+		return startPoints;
+	}
+
+}