diff --git a/owlapi/pom.xml b/owlapi/pom.xml
index c71605999..ebe32e7de 100644
--- a/owlapi/pom.xml
+++ b/owlapi/pom.xml
@@ -7,7 +7,7 @@
 		<version>2.4.0-SNAPSHOT</version>
 	</parent>
 	<artifactId>pellet-owlapi</artifactId>
-	<name>Pellet :: OWL API (ignazio1977 fork)</name>
+	<name>Pellet :: OWL API</name>
 	<dependencies>
 		<dependency>
 			<groupId>${project.groupId}</groupId>
diff --git a/pom.xml b/pom.xml
index fcdbef2f2..b7ec43173 100644
--- a/pom.xml
+++ b/pom.xml
@@ -12,7 +12,7 @@
   <artifactId>pellet-parent</artifactId>
   <version>2.4.0-SNAPSHOT</version>
   <packaging>pom</packaging>
-  <name>Pellet :: Parent POM</name>
+  <name>Pellet</name>
   <description>The Clark and Parsia Pellet OWL Reasoner</description>
   <url>https://github.com/clarkparsia/pellet</url>
   <licenses>
@@ -42,7 +42,7 @@
   <properties>
     <junit.version>4.11</junit.version>
     <slf4j.version>1.7.5</slf4j.version>
-	<owlapi.version>[4.0.2,4.2)</owlapi.version>
+	<owlapi.version>4.2.7</owlapi.version>
     <jena.version>2.13.0</jena.version>
     <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
     <project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>
diff --git a/test/src/test/java/com/clarkparsia/modularity/test/PersistenceUpdatesTest.java b/test/src/test/java/com/clarkparsia/modularity/test/PersistenceUpdatesTest.java
index b5607beb1..b11ae91d4 100644
--- a/test/src/test/java/com/clarkparsia/modularity/test/PersistenceUpdatesTest.java
+++ b/test/src/test/java/com/clarkparsia/modularity/test/PersistenceUpdatesTest.java
@@ -108,16 +108,15 @@ public void testPersistenceRemoves(String inputOnt) throws IOException {
 			// at this point there should be a change to the ontology that is not applied yet to the classifier
 			// this should cause the save operation to fail
 
+			FileOutputStream fos = new FileOutputStream( testFile );
 			try {
-				FileOutputStream fos = new FileOutputStream( testFile );
-
 				IncrementalClassifierPersistence.save( modular, fos );
 				fail( "The incremental classifer must not allow itself to be persisted if there are any unapplied changes to the ontology" );
-
-				fos.close();
 			} catch( IllegalStateException e ) {
-				assertTrue( testFile.delete() );
 				// correct behavior
+			} finally {
+				fos.close();
+				assertTrue( testFile.delete() );
 			}
 
 		} finally {
@@ -155,17 +154,16 @@ public void testPersistenceAdds(String inputOnt) throws IOException {
 			// at this point there should be a change to the ontology that is not applied yet to the classifier
 			// this should cause the save operation to fail
 
+			FileOutputStream fos = new FileOutputStream( testFile );
 			try {
-				FileOutputStream fos = new FileOutputStream( testFile );
-
 				IncrementalClassifierPersistence.save( modular, fos );
 				fail( "The incremental classifer must not allow itself to be persisted if there are any unapplied changes to the ontology" );
-
-				fos.close();
 			} catch( IllegalStateException e ) {
-				assertTrue( testFile.delete() );
 				// correct behavior
-			} 		
+			} finally {
+				fos.close();
+				assertTrue( testFile.delete() );
+			}		
 			
 			modular.dispose();
 		} finally {
@@ -208,13 +206,15 @@ public void testAllowedUpdates(String inputOnt) throws IOException {
 			modular.classify();
 
 			// at this point, the ontology should be updated (despite the changes), and the save should succeed.		
+			
 			FileOutputStream fos = new FileOutputStream( testFile );
-
-			IncrementalClassifierPersistence.save( modular, fos );
-
-			fos.close();
-
-			assertTrue( testFile.delete() );		
+			try {
+				IncrementalClassifierPersistence.save( modular, fos );
+			} finally {
+				fos.close();
+				assertTrue( testFile.delete() );
+			}
+					
 		} finally {
 			OWL.manager.removeOntology( ontology );	
 		}	
@@ -239,18 +239,23 @@ public void testUpdatesAfterPersistence(String inputOnt) throws IOException {
 			IncrementalClassifier modular = PelletIncremantalReasonerFactory.getInstance().createReasoner( ontology, moduleExtractor );
 			modular.classify();
 
-			FileOutputStream fos = new FileOutputStream( testFile );
-
-			IncrementalClassifierPersistence.save( modular, fos );
-
-			fos.close();
-
-
-			FileInputStream fis = new FileInputStream( testFile );
-
-			modular = IncrementalClassifierPersistence.load( fis );
-
-			fis.close();
+			try {
+				FileOutputStream fos = new FileOutputStream( testFile );
+				try {
+					IncrementalClassifierPersistence.save( modular, fos );
+				} finally {
+					fos.close();
+				}
+
+				FileInputStream fis = new FileInputStream( testFile );
+				try {
+					modular = IncrementalClassifierPersistence.load( fis );
+				} finally {
+					fis.close();
+				}
+			} finally {
+				assertTrue( testFile.delete() );
+			}
 
 			// first remove a random axiom
 			List<OWLAxiom> axiomsToRemove = new ArrayList<OWLAxiom>( TestUtils.selectRandomAxioms( ontology, 1 ) );
@@ -286,17 +291,23 @@ public void testUpdatesAfterPersistence2(String inputOnt) throws IOException {
 			IncrementalClassifier modular = PelletIncremantalReasonerFactory.getInstance().createReasoner( ontology, createModuleExtractor() );		
 			modular.classify();
 
-			FileOutputStream fos = new FileOutputStream( testFile );
-
-			IncrementalClassifierPersistence.save( modular, fos );
-
-			fos.close();
-
-			FileInputStream fis = new FileInputStream( testFile );
-
-			modular = IncrementalClassifierPersistence.load( fis, ontology );
-
-			fis.close();
+			try {
+				FileOutputStream fos = new FileOutputStream( testFile );
+				try {
+					IncrementalClassifierPersistence.save( modular, fos );
+				} finally {
+					fos.close();
+				}
+
+				FileInputStream fis = new FileInputStream( testFile );
+				try {
+					modular = IncrementalClassifierPersistence.load( fis, ontology );
+				} finally {
+					fis.close();
+				}
+			} finally {
+				assertTrue( testFile.delete() );
+			}
 
 			// first remove a random axiom
 			List<OWLAxiom> axiomsToRemove = new ArrayList<OWLAxiom>( TestUtils.selectRandomAxioms( ontology, 1 ) );
@@ -323,26 +334,32 @@ public void testUpdatesWhenPersisted(String inputOnt) throws IOException {
 			IncrementalClassifier modular = PelletIncremantalReasonerFactory.getInstance().createReasoner( ontology, createModuleExtractor() );		
 			modular.classify();
 
-			FileOutputStream fos = new FileOutputStream( testFile );
-
-			IncrementalClassifierPersistence.save( modular, fos );
-
-			fos.close();
-
-			// perform changes while the classifier is stored on disk
-			// first remove a random axiom
-			List<OWLAxiom> axiomsToRemove = new ArrayList<OWLAxiom>( TestUtils.selectRandomAxioms( ontology, 1 ) );
-
-			for( OWLAxiom axiomToRemove : axiomsToRemove ) {
-				OWL.manager.applyChange( new RemoveAxiom(ontology, axiomToRemove ) );
+			try {
+				FileOutputStream fos = new FileOutputStream( testFile );
+				try {
+					IncrementalClassifierPersistence.save( modular, fos );
+				} finally {
+					fos.close();
+				}
+
+				// perform changes while the classifier is stored on disk
+				// first remove a random axiom
+				List<OWLAxiom> axiomsToRemove = new ArrayList<OWLAxiom>( TestUtils.selectRandomAxioms( ontology, 1 ) );
+
+				for( OWLAxiom axiomToRemove : axiomsToRemove ) {
+					OWL.manager.applyChange( new RemoveAxiom(ontology, axiomToRemove ) );
+				}
+
+				FileInputStream fis = new FileInputStream( testFile );
+				try {
+					modular = IncrementalClassifierPersistence.load( fis, ontology );
+				} finally {
+					fis.close();
+				}
+			} finally {
+				assertTrue( testFile.delete() );
 			}
 
-			FileInputStream fis = new FileInputStream( testFile );
-
-			modular = IncrementalClassifierPersistence.load( fis, ontology );
-
-			fis.close();
-
 			PelletReasoner expected = PelletReasonerFactory.getInstance().createReasoner( ontology );
 
 			assertClassificationEquals( expected, modular );