Problemas com o framework JENA

Programação Java
#1

Olá Pessoal, estou tentando ler um arquivo owl pelo JENA, mas quando chamo o método read da classe OntModel, está retornando o erro abaixo:

Será que alguém pode me ajudar? :S

Este é meu owl:

<rdf:RDF
    xmlns:rss="http://purl.org/rss/1.0/"
    xmlns:jms="http://jena.hpl.hp.com/2003/08/jms#"
    xmlns:j.0="http://protege.stanford.edu/plugins/owl/protege#"
    xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#"
    xmlns:xsd="http://www.w3.org/2001/XMLSchema#"
    xmlns:rdfs="http://www.w3.org/2000/01/rdf-schema#"
    xmlns:owl="http://www.w3.org/2002/07/owl#"
    xmlns:vcard="http://www.w3.org/2001/vcard-rdf/3.0#"
    xmlns:daml="http://www.daml.org/2001/03/daml+oil#"
    xmlns:dc="http://purl.org/dc/elements/1.1/">

  <owl:Ontology rdf:about="" />

  <owl:Class rdf:ID="Motorcycle">
    <rdfs:subClassOf>
      <owl:Class rdf:about="#RoadVehicle"/>
    </rdfs:subClassOf>
  </owl:Class>
</rdf:RDF>

Erro:

ERROR [main] (RDFDefaultErrorHandler.java:44) - Premature end of file.
Exception in thread "main" com.hp.hpl.jena.shared.JenaException: org.xml.sax.SAXParseException: Premature end of file.
        at com.hp.hpl.jena.rdf.model.impl.RDFDefaultErrorHandler.fatalError(RDFDefaultErrorHandler.java:45)
        at com.hp.hpl.jena.rdf.arp.impl.ARPSaxErrorHandler.fatalError(ARPSaxErrorHandler.java:35)
        at com.hp.hpl.jena.rdf.arp.impl.XMLHandler.warning(XMLHandler.java:225)
        at com.hp.hpl.jena.rdf.arp.impl.XMLHandler.fatalError(XMLHandler.java:255)
        at org.apache.xerces.util.ErrorHandlerWrapper.fatalError(Unknown Source)
        at org.apache.xerces.impl.XMLErrorReporter.reportError(Unknown Source)
        at org.apache.xerces.impl.XMLErrorReporter.reportError(Unknown Source)
        at org.apache.xerces.impl.XMLScanner.reportFatalError(Unknown Source)
        at org.apache.xerces.impl.XMLDocumentScannerImpl$XMLDeclDispatcher.dispatch(Unknown Source)
        at org.apache.xerces.impl.XMLDocumentFragmentScannerImpl.scanDocument(Unknown Source)
        at org.apache.xerces.parsers.DTDConfiguration.parse(Unknown Source)
        at org.apache.xerces.parsers.DTDConfiguration.parse(Unknown Source)
        at org.apache.xerces.parsers.XMLParser.parse(Unknown Source)
        at org.apache.xerces.parsers.AbstractSAXParser.parse(Unknown Source)
        at com.hp.hpl.jena.rdf.arp.impl.RDFXMLParser.parse(RDFXMLParser.java:107)
        at com.hp.hpl.jena.rdf.arp.JenaReader.read(JenaReader.java:158)
        at com.hp.hpl.jena.rdf.arp.JenaReader.read(JenaReader.java:145)
        at com.hp.hpl.jena.rdf.arp.JenaReader.read(JenaReader.java:215)
        at com.hp.hpl.jena.rdf.model.impl.ModelCom.read(ModelCom.java:217)
        at com.hp.hpl.jena.ontology.impl.OntModelImpl.read(OntModelImpl.java:2148)
        at com.hp.hpl.jena.rdf.model.impl.ModelCom.read(ModelCom.java:202)
        at com.hp.hpl.jena.ontology.impl.OntModelImpl.readDelegate(OntModelImpl.java:3024)
        at com.hp.hpl.jena.ontology.impl.OntModelImpl.read(OntModelImpl.java:2106)
        at com.hp.hpl.jena.ontology.impl.OntModelImpl.read(OntModelImpl.java:2022)
        at br.edu.uem.din.trs.cato.SolCombSinonimosVDefesaMestrado.leOnto(SolComb.java:38)
        at br.edu.uem.din.trs.cato.SolCombSinonimosVDefesaMestrado.main(SolComb.java:642)
Caused by: org.xml.sax.SAXParseException: Premature end of file.
        at org.apache.xerces.util.ErrorHandlerWrapper.createSAXParseException(Unknown Source)
        ... 22 more
#2