diff --git a/webapp/src/edu/cornell/mannlib/vitro/webapp/rdfservice/ModelChange.java b/webapp/src/edu/cornell/mannlib/vitro/webapp/rdfservice/ModelChange.java
index 10dd8934a..a5f8b5bfb 100644
--- a/webapp/src/edu/cornell/mannlib/vitro/webapp/rdfservice/ModelChange.java
+++ b/webapp/src/edu/cornell/mannlib/vitro/webapp/rdfservice/ModelChange.java
@@ -14,20 +14,60 @@ public interface ModelChange {
 	public enum Operation {
 	    ADD, REMOVE
 	}
-		
+	
+	/**   
+	 * Getter for the serialized model
+	 * 
+	 * @return InputStream - a model (collection of RDF triples), serialized            
+	 */
 	public InputStream getSerializedModel();
 	
+	/**
+	 * Setter for the serialized model
+	 * 
+	 * @param InputStream - a model (collection of RDF triples), serialized            
+	 */
 	public void setSerializedModel(InputStream serializedModel);
 	
+	/**
+	 * Getter for the serialization format of the model
+	 * 
+	 * @return RDFService.ModelSerializationFormat - the serialization format of the model
+	 */
 	public RDFService.ModelSerializationFormat getSerializationFormat();
 	
+	/**
+	 * Setter for the serialization format of the model
+	 * 
+	 * @param RDFService.ModelSerializationFormat - the serialization format of the model
+	 */
 	public void setSerializationFormat(RDFService.ModelSerializationFormat serializationFormat);
 	
-	public Operation getOperation();
-	
-	public void setOperation(Operation operation);
-	
+	/**
+	 * Getter for the operation type
+	 * 
+	 * @return ModelChange.Operation - the operation type
+	 */
+	public ModelChange.Operation getOperation();
+
+	/**
+	 * Setter for the operation type
+	 * 
+	 * @param ModelChange.Operation - the operation type
+	 */
+	public void setOperation(ModelChange.Operation operation);
+
+	/**
+	 * Getter for the URI of the graph to which to apply the change
+	 * 
+	 * @return String - the graph URI
+	 */
 	public String getGraphURI();
-	
+
+	/**
+	 * Setter for the URI of the graph to which to apply the change
+	 * 
+	 * @param String - the graph URI
+	 */
 	public void setGraphURI(String graphURI);
 }
diff --git a/webapp/src/edu/cornell/mannlib/vitro/webapp/rdfservice/impl/ModelChangeImpl.java b/webapp/src/edu/cornell/mannlib/vitro/webapp/rdfservice/impl/ModelChangeImpl.java
index 717237f64..64706dbe4 100644
--- a/webapp/src/edu/cornell/mannlib/vitro/webapp/rdfservice/impl/ModelChangeImpl.java
+++ b/webapp/src/edu/cornell/mannlib/vitro/webapp/rdfservice/impl/ModelChangeImpl.java
@@ -31,41 +31,81 @@ public class ModelChangeImpl implements ModelChange {
 		this.graphURI = graphURI;
 	}
 
+	/**   
+	 * Getter for the serialized model
+	 * 
+	 * @return InputStream - a model (collection of RDF triples), serialized            
+	 */
 	@Override
 	public InputStream getSerializedModel() {
 		return serializedModel;
 	}
 	
+	/**
+	 * Setter for the serialized model
+	 * 
+	 * @param InputStream - a model (collection of RDF triples), serialized            
+	 */
 	@Override
 	public void setSerializedModel(InputStream serializedModel) {
 		this.serializedModel = serializedModel;
 	}
 	
+	/**
+	 * Getter for the serialization format of the model
+	 * 
+	 * @return RDFService.ModelSerializationFormat - the serialization format of the model
+	 */
 	@Override
 	public RDFService.ModelSerializationFormat getSerializationFormat() {
 		return serializationFormat;
 	}
 	
+	/**
+	 * Setter for the serialization format of the model
+	 * 
+	 * @param RDFService.ModelSerializationFormat - the serialization format of the model
+	 */
 	@Override
 	public void setSerializationFormat(RDFService.ModelSerializationFormat serializationFormat) {
 		this.serializationFormat = serializationFormat;
 	}
 	
+	/**
+	 * Getter for the operation type
+	 * 
+	 * @return ModelChange.Operation - the operation type
+	 */
 	@Override
 	public Operation getOperation() {
 		return operation;
 	}
 	
+	/**
+	 * Setter for the operation type
+	 * 
+	 * @param ModelChange.Operation - the operation type
+	 */
 	@Override
 	public void setOperation(Operation operation) {
 		this.operation = operation;
 	}
-	
+
+	/**
+	 * Getter for the URI of the graph to which to apply the change
+	 * 
+	 * @return String - the graph URI
+	 */
 	@Override
 	public String getGraphURI() {
 		return graphURI;
 	}
-	
+
+	/**
+	 * Setter for the URI of the graph to which to apply the change
+	 * 
+	 * @param String - the graph URI
+	 */
 	@Override
 	public void setGraphURI(String graphURI) {
 		this.graphURI = graphURI;