diff --git a/src/org/ntlab/deltaViewer/CollaborationAliasCollector.java b/src/org/ntlab/deltaViewer/CollaborationAliasCollector.java
new file mode 100644
index 0000000..89345f9
--- /dev/null
+++ b/src/org/ntlab/deltaViewer/CollaborationAliasCollector.java
@@ -0,0 +1,36 @@
+package org.ntlab.deltaViewer;
+
+import java.util.ArrayList;
+import java.util.List;
+
+import org.ntlab.deltaExtractor.Alias;
+import org.ntlab.deltaExtractor.IAliasCollector;
+
+public class CollaborationAliasCollector implements IAliasCollector {
+	// Reverse execution order.
+	private List<Alias> aliasList = new ArrayList<>();
+
+	public CollaborationAliasCollector(DeltaAliasCollector dac) {
+		aliasList.addAll(dac.getAliasList());
+	}
+	
+	/*
+	 * Do nothing!
+	 */
+	@Override
+	public void addAlias(Alias alias) {
+		// TODO Auto-generated method stub
+
+	}
+
+	@Override
+	public List<Alias> getAliasList() {
+		return aliasList;
+	}
+
+	public void merge(DeltaAliasCollector dac) {
+		for (Alias alias: dac.getAliasList()) {
+			
+		}
+	}
+}