Очищение ну нельзя на поприще.

Method public final java.lang.String com.seo.core.service.library.MarkovTextGenerator$$EnhancerByCGLIB$$c10b01b.generateText() threw an exception when invoked on com.seo.core.service.library.MarkovTextGenerator@759230 with arguments of types [] The problematic instruction: ---------- ==> ${generator.generateText()} [on line 75, column 28 in index.tpl] ---------- Java backtrace for programmers: ---------- freemarker.template.TemplateModelException: Method public final java.lang.String com.seo.core.service.library.MarkovTextGenerator$$EnhancerByCGLIB$$c10b01b.generateText() threw an exception when invoked on com.seo.core.service.library.MarkovTextGenerator@759230 with arguments of types [] at freemarker.ext.beans.OverloadedMethodModel.exec(OverloadedMethodModel.java:134) at freemarker.core.MethodCall._getAsTemplateModel(MethodCall.java:93) 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:208) at freemarker.core.MixedContent.accept(MixedContent.java:92) at freemarker.core.Environment.visit(Environment.java:208) at freemarker.core.IteratorBlock$Context.runLoop(IteratorBlock.java:179) at freemarker.core.Environment.visit(Environment.java:415) at freemarker.core.IteratorBlock.accept(IteratorBlock.java:102) at freemarker.core.Environment.visit(Environment.java:208) at freemarker.core.MixedContent.accept(MixedContent.java:92) at freemarker.core.Environment.visit(Environment.java:208) at freemarker.core.Environment.process(Environment.java:188) at freemarker.template.Template.process(Template.java:237) at com.seo.core.service.doorgen.pages.PageGeneratorImpl.freemarkerDo(PageGeneratorImpl.java:60) at com.seo.core.service.doorgen.pages.PageGeneratorImpl.generatePage(PageGeneratorImpl.java:44) at com.seo.core.service.doorgen.DoorwayGeneratorImpl.generateDoorway(DoorwayGeneratorImpl.java:74) at com.seo.core.concurrency.GenerateDoorwayTask.generate(GenerateDoorwayTask.java:59) at com.seo.core.concurrency.GenerateDoorwayTask.run(GenerateDoorwayTask.java:50) at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:886) at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:908) at java.lang.Thread.run(Thread.java:619) Caused by: java.lang.NullPointerException: replacement at java.util.regex.Matcher.replaceFirst(Matcher.java:857) at java.lang.String.replaceFirst(String.java:2146) at com.seo.core.service.library.MarkovTextGenerator.generateSentence(MarkovTextGenerator.java:48) at com.seo.core.service.library.BasicTextGenerator.generateText(BasicTextGenerator.java:126) at com.seo.core.service.library.BasicTextGenerator$$FastClassByCGLIB$$d75700d5.invoke() at net.sf.cglib.proxy.MethodProxy.invoke(MethodProxy.java:149) at org.springframework.aop.framework.Cglib2AopProxy$CglibMethodInvocation.invokeJoinpoint(Cglib2AopProxy.java:700) at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:149) at org.springframework.transaction.interceptor.TransactionInterceptor.invoke(TransactionInterceptor.java:106) at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:171) at org.springframework.aop.framework.Cglib2AopProxy$DynamicAdvisedInterceptor.intercept(Cglib2AopProxy.java:635) at com.seo.core.service.library.MarkovTextGenerator$$EnhancerByCGLIB$$c10b01b.generateText() at sun.reflect.GeneratedMethodAccessor109.invoke(Unknown Source) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25) at java.lang.reflect.Method.invoke(Method.java:597) at freemarker.ext.beans.BeansWrapper.invokeMethod(BeansWrapper.java:835) at freemarker.ext.beans.OverloadedMethodModel.exec(OverloadedMethodModel.java:104) ... 23 more