diff --git a/app/carnival-core/src/main/groovy/carnival/core/Carnival.groovy b/app/carnival-core/src/main/groovy/carnival/core/Carnival.groovy
index 8d2a949..5a39442 100644
--- a/app/carnival-core/src/main/groovy/carnival/core/Carnival.groovy
+++ b/app/carnival-core/src/main/groovy/carnival/core/Carnival.groovy
@@ -149,6 +149,24 @@ abstract class Carnival implements GremlinTrait {
 
 
 
+	///////////////////////////////////////////////////////////////////////////
+	// ABSTRACT INTERFACE
+	///////////////////////////////////////////////////////////////////////////
+
+	/** 
+	 * Close this carnival.
+	 * 
+	 */
+	abstract void close()
+
+
+	/** 
+	 * Dispose of the resources of this carnival.
+	 * 
+	 * */
+	abstract void dispose()
+
+
 	///////////////////////////////////////////////////////////////////////////
 	// INITIALIZATION
 	///////////////////////////////////////////////////////////////////////////
diff --git a/app/carnival-core/src/main/groovy/carnival/core/CarnivalJanusBerkeley.groovy b/app/carnival-core/src/main/groovy/carnival/core/CarnivalJanusBerkeley.groovy
index 9f8402d..a092bf2 100644
--- a/app/carnival-core/src/main/groovy/carnival/core/CarnivalJanusBerkeley.groovy
+++ b/app/carnival-core/src/main/groovy/carnival/core/CarnivalJanusBerkeley.groovy
@@ -78,6 +78,9 @@ class CarnivalJanusBerkeley extends Carnival {
     /** The names of the indexes created */
     Set<String> indexNames = new HashSet<String>()
 
+    /** */
+    boolean openedExisting = false
+
 
 	///////////////////////////////////////////////////////////////////////////
 	// FACTORY 
@@ -149,6 +152,7 @@ class CarnivalJanusBerkeley extends Carnival {
 
         if (graphDirExists) {
 
+            carnival.openedExisting = true
             carnival.initPropModelNoMgmt()
             carnival.initVertModelNoMgmt()
             carnival.initEdgeModelNoMgmt()
@@ -755,6 +759,15 @@ class CarnivalJanusBerkeley extends Carnival {
     }
 
 
+    /** 
+     * Dispose of the resources of this Carnival.
+     */
+    public void dispose() {
+        this.close()
+        CarnivalJanusBerkeley.clearGraph(this.config)
+    }
+
+
 
     ///////////////////////////////////////////////////////////////////////////
     // CLASSES
diff --git a/app/carnival-core/src/main/groovy/carnival/core/CarnivalTinker.groovy b/app/carnival-core/src/main/groovy/carnival/core/CarnivalTinker.groovy
index dc6c17e..27f5f3e 100644
--- a/app/carnival-core/src/main/groovy/carnival/core/CarnivalTinker.groovy
+++ b/app/carnival-core/src/main/groovy/carnival/core/CarnivalTinker.groovy
@@ -72,4 +72,12 @@ class CarnivalTinker extends Carnival {
         graph.close()
     }
 
+
+    /** 
+     * Dispose of the resources of this Carnival.
+     */
+    public void dispose() {
+        this.close()
+    }
+
 }
diff --git a/app/carnival-core/src/test/groovy/carnival/core/CarnivalInitSpec.groovy b/app/carnival-core/src/test/groovy/carnival/core/CarnivalInitSpec.groovy
index 7bc06a2..a9bf572 100644
--- a/app/carnival-core/src/test/groovy/carnival/core/CarnivalInitSpec.groovy
+++ b/app/carnival-core/src/test/groovy/carnival/core/CarnivalInitSpec.groovy
@@ -73,7 +73,7 @@ class CarnivalInitSpec extends Specification {
 
         def g = graph.traversal()
         try {
-            carnival.initialize(graph, g)
+            carnival.initModel(graph, g)
         } finally {
             if (g) g.close()
         }
diff --git a/app/carnival-core/src/test/groovy/carnival/core/CarnivalJanusBerkeleyFilesSpec.groovy b/app/carnival-core/src/test/groovy/carnival/core/CarnivalJanusBerkeleyFilesSpec.groovy
index 118e58c..82263f4 100644
--- a/app/carnival-core/src/test/groovy/carnival/core/CarnivalJanusBerkeleyFilesSpec.groovy
+++ b/app/carnival-core/src/test/groovy/carnival/core/CarnivalJanusBerkeleyFilesSpec.groovy
@@ -118,6 +118,8 @@ class CarnivalJanusBerkeleyFilesSpec extends Specification {
         }
 
         then:
+        carnival
+        !carnival.openedExisting
         numVerts1
 
         when:
@@ -130,6 +132,7 @@ class CarnivalJanusBerkeleyFilesSpec extends Specification {
 
         then:
         carnival
+        carnival.openedExisting
         numVerts1 == numVerts2
 
         cleanup:
diff --git a/app/carnival-core/src/test/groovy/carnival/core/CarnivalModelSpec.groovy b/app/carnival-core/src/test/groovy/carnival/core/CarnivalModelSpec.groovy
index 3381bce..92888e6 100644
--- a/app/carnival-core/src/test/groovy/carnival/core/CarnivalModelSpec.groovy
+++ b/app/carnival-core/src/test/groovy/carnival/core/CarnivalModelSpec.groovy
@@ -135,9 +135,10 @@ class CarnivalModelSpec extends Specification {
 
         expect:
         carnival.checkModel().size() == 0
-        GraphModel.VX.DOG_CLASS.vertex == null
 
         when:
+        GraphModel.VX.DOG_CLASS.vertex = null
+        
         int numVerts1
         carnival.withGremlin { graph, g ->
             numVerts1 = g.V().count().next()