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java.lang.NullPointerException: 	at org.hibernate.util.StringHelper.qualifier(StringHelper.java:132)	at org.hibernate.tool.hbm2x.pojo.BasicPOJOClass.getQualifiedDeclarationName(BasicPOJOClass.java:95)	at org.hibernate.tool.hbm2x.doc.DocFileManager.getEntityDocFileByDeclarationName(DocFileManager.java:391)	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)	at java.lang.reflect.Method.invoke(Method.java:585)	at freemarker.ext.beans.BeansWrapper.invokeMethod(BeansWrapper.java:616)	at freemarker.ext.beans.SimpleMethodModel.exec(SimpleMethodModel.java:113)	at freemarker.core.MethodCall._getAsTemplateModel(MethodCall.java:93)	at freemarker.core.Expression.getAsTemplateModel(Expression.java:89)	at freemarker.core.ListLiteral.getModelList(ListLiteral.java:125)	at freemarker.core.MethodCall._getAsTemplateModel(MethodCall.java:89)	at freemarker.core.Expression.getAsTemplateModel(Expression.java:89)	at freemarker.core.Expression.getStringValue(Expression.java:93)	at freemarker.core.DollarVariable.accept(DollarVariable.java:76)	at freemarker.core.Environment.visit(Environment.java:196)	at freemarker.core.MixedContent.accept(MixedContent.java:92)	at freemarker.core.Environment.visit(Environment.java:196)	at freemarker.core.IfBlock.accept(IfBlock.java:82)	at freemarker.core.Environment.visit(Environment.java:196)	at freemarker.core.MixedContent.accept(MixedContent.java:92)	at freemarker.core.Environment.visit(Environment.java:196)	at freemarker.core.IteratorBlock$Context.runLoop(IteratorBlock.java:160)	at freemarker.core.Environment.visit(Environment.java:351)	at freemarker.core.IteratorBlock.accept(IteratorBlock.java:95)	at freemarker.core.Environment.visit(Environment.java:196)	at freemarker.core.MixedContent.accept(MixedContent.java:92)	at freemarker.core.Environment.visit(Environment.java:196)	at freemarker.core.ConditionalBlock.accept(ConditionalBlock.java:79)	at freemarker.core.Environment.visit(Environment.java:196)	at freemarker.core.MixedContent.accept(MixedContent.java:92)	at freemarker.core.Environment.visit(Environment.java:196)	at freemarker.core.Environment.process(Environment.java:176)	at freemarker.template.Template.process(Template.java:232)	at org.hibernate.tool.hbm2x.TemplateHelper.processTemplate(TemplateHelper.java:251)	at org.hibernate.tool.hbm2x.TemplateProducer.produceToString(TemplateProducer.java:67)	at org.hibernate.tool.hbm2x.TemplateProducer.produce(TemplateProducer.java:28)	at org.hibernate.tool.hbm2x.TemplateProducer.produce(TemplateProducer.java:97)	at org.hibernate.tool.hbm2x.DocExporter.processTemplate(DocExporter.java:614)	at org.hibernate.tool.hbm2x.DocExporter.generateEntitiesDetails(DocExporter.java:436)	at org.hibernate.tool.hbm2x.DocExporter.doStart(DocExporter.java:162)	at org.hibernate.tool.hbm2x.AbstractExporter.start(AbstractExporter.java:95)	at org.hibernate.eclipse.launch.CodeGenerationLaunchDelegate$1.execute(CodeGenerationLaunchDelegate.java:245)	at org.hibernate.console.execution.DefaultExecutionContext.execute(DefaultExecutionContext.java:65)	at org.hibernate.console.ConsoleConfiguration.execute(ConsoleConfiguration.java:88)	at org.hibernate.eclipse.launch.CodeGenerationLaunchDelegate.runExporters(CodeGenerationLaunchDelegate.java:215)	at org.hibernate.eclipse.launch.CodeGenerationLaunchDelegate.launch(CodeGenerationLaunchDelegate.java:130)	at org.eclipse.debug.internal.core.LaunchConfiguration.launch(LaunchConfiguration.java:766)	at org.eclipse.debug.internal.core.LaunchConfiguration.launch(LaunchConfiguration.java:608)	at org.eclipse.debug.internal.ui.DebugUIPlugin.buildAndLaunch(DebugUIPlugin.java:899)	at org.eclipse.debug.internal.ui.DebugUIPlugin$7.run(DebugUIPlugin.java:1102)	at org.eclipse.core.internal.jobs.Worker.run(Worker.java:55)