org.xml.sax.SAXParseException: The markup declarations contained or pointed to by the document type declaration must be well-formed.
   at com.sun.org.apache.xerces.internal.util.ErrorHandlerWrapper.createSAXParseException(ErrorHandlerWrapper.java:195)
   at com.sun.org.apache.xerces.internal.util.ErrorHandlerWrapper.fatalError(ErrorHandlerWrapper.java:174)
   at com.sun.org.apache.xerces.internal.impl.XMLErrorReporter.reportError(XMLErrorReporter.java:388)
   at com.sun.org.apache.xerces.internal.impl.XMLScanner.reportFatalError(XMLScanner.java:1414)
   at com.sun.org.apache.xerces.internal.impl.XMLDTDScannerImpl.scanDecls(XMLDTDScannerImpl.java:1998)
   at com.sun.org.apache.xerces.internal.impl.XMLDTDScannerImpl.scanDTDExternalSubset(XMLDTDScannerImpl.java:320)
   at com.sun.org.apache.xerces.internal.impl.XMLDocumentScannerImpl$DTDDriver.dispatch(XMLDocumentScannerImpl.java:1203)
   at com.sun.org.apache.xerces.internal.impl.XMLDocumentScannerImpl$DTDDriver.next(XMLDocumentScannerImpl.java:1090)
   at com.sun.org.apache.xerces.internal.impl.XMLDocumentScannerImpl$PrologDriver.next(XMLDocumentScannerImpl.java:1003)
   at com.sun.org.apache.xerces.internal.impl.XMLDocumentScannerImpl.next(XMLDocumentScannerImpl.java:648)
   at com.sun.org.apache.xerces.internal.impl.XMLNSDocumentScannerImpl.next(XMLNSDocumentScannerImpl.java:140)
   at com.sun.org.apache.xerces.internal.impl.XMLDocumentFragmentScannerImpl.scanDocument(XMLDocumentFragmentScannerImpl.java:511)
   at com.sun.org.apache.xerces.internal.parsers.XML11Configuration.parse(XML11Configuration.java:808)
   at com.sun.org.apache.xerces.internal.parsers.XML11Configuration.parse(XML11Configuration.java:737)
   at com.sun.org.apache.xerces.internal.parsers.XMLParser.parse(XMLParser.java:119)
   at com.sun.org.apache.xerces.internal.parsers.AbstractSAXParser.parse(AbstractSAXParser.java:1205)
   at com.sun.org.apache.xerces.internal.jaxp.SAXParserImpl$JAXPSAXParser.parse(SAXParserImpl.java:522)
Caused: org.jdom.input.JDOMParseException: Error on line 1 of document http://www.puppycrawl.com/dtds/configuration_1_2.dtd: The markup declarations contained or pointed to by the document type declaration must be well-formed.
   at org.jdom.input.SAXBuilder.build(SAXBuilder.java:465)
   at org.jdom.input.SAXBuilder.build(SAXBuilder.java:770)
   at org.netbeans.modules.maven.format.checkstyle.ModuleConvertor.convert(ModuleConvertor.java:128)
   at org.netbeans.modules.maven.format.checkstyle.AuxPropsImpl.convert(AuxPropsImpl.java:211)
   at org.netbeans.modules.maven.format.checkstyle.AuxPropsImpl.getCache(AuxPropsImpl.java:290)
   at org.netbeans.modules.maven.format.checkstyle.AuxPropsImpl.get(AuxPropsImpl.java:305)
   at org.netbeans.modules.maven.MavenProjectPropsImpl$MergedAuxProperties.get(MavenProjectPropsImpl.java:278)
   at org.netbeans.modules.maven.api.execute.RunUtils.hasApplicationCompileOnSaveEnabled(RunUtils.java:133)
   at org.netbeans.modules.maven.cos.CosChecker.touchProject(CosChecker.java:770)
   at org.netbeans.modules.maven.cos.CosChecker$CosPOH.projectOpened(CosChecker.java:793)
   at org.netbeans.spi.project.ui.ProjectOpenedHook$1.projectOpened(ProjectOpenedHook.java:84)
   at org.netbeans.modules.project.ui.OpenProjectList.notifyOpened(OpenProjectList.java:1104)
   at org.netbeans.modules.project.ui.OpenProjectList.doOpenProject(OpenProjectList.java:1181)
   at org.netbeans.modules.project.ui.OpenProjectList.doOpen(OpenProjectList.java:700)
   at org.netbeans.modules.project.ui.OpenProjectList.open(OpenProjectList.java:613)
   at org.netbeans.modules.project.ui.OpenProjectList.open(OpenProjectList.java:549)
   at org.netbeans.modules.project.ui.OpenProjectsTrampolineImpl.openAPI(OpenProjectsTrampolineImpl.java:75)
   at org.netbeans.api.project.ui.OpenProjects.open(OpenProjects.java:172)
   at org.netbeans.modules.maven.actions.scm.CheckoutAction$1.taskFinished(CheckoutAction.java:136)
   at org.openide.util.Task.notifyFinished(Task.java:231)
   at org.netbeans.core.execution.ExecutorTaskImpl.finished(ExecutorTaskImpl.java:89)
   at org.netbeans.core.execution.RunClassThread.run(RunClassThread.java:176)