Problems with Spring MVC tutorial

I've been doing "http://confluence.jetbrains.com/display/IntelliJIDEA/Getting+Started+with+Spring+MVC%2C+Hibernate+and+JSON" to learn more about Intellij... And it was GREAT indeed.

Except that I did something wrong and got an exception:

-----

HTTP Status 500 - Servlet.init() for servlet mvc-dispatcher threw exception

type Exception report

message Servlet.init() for servlet mvc-dispatcher threw exception

description The server encountered an internal error that prevented it from fulfilling this request.

exception

javax.servlet.ServletException: Servlet.init() for servlet mvc-dispatcher threw exception

org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:502)

org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:100)

org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:953)

org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:408)

org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:1041)

org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:603)

org.apache.tomcat.util.net.JIoEndpoint$SocketProcessor.run(JIoEndpoint.java:310)

java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)

java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)

java.lang.Thread.run(Thread.java:744)

root cause

org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'org.springframework.dao.annotation.PersistenceExceptionTranslationPostProcessor#0': Initialization of bean failed; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'entityManagerFactory' defined in ServletContext resource [/WEB-INF/mvc-dispatcher-servlet.xml]: Invocation of init method failed; nested exception is javax.persistence.PersistenceException: No Persistence provider for EntityManager named defaultPersistenceUnit

org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:532)

org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:461)

org.springframework.beans.factory.support.AbstractBeanFactory$1.getObject(AbstractBeanFactory.java:295)

org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:223)

org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:292)

org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:198)

org.springframework.context.support.AbstractApplicationContext.registerBeanPostProcessors(AbstractApplicationContext.java:741)

org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:464)

org.springframework.web.servlet.FrameworkServlet.configureAndRefreshWebApplicationContext(FrameworkServlet.java:647)

org.springframework.web.servlet.FrameworkServlet.createWebApplicationContext(FrameworkServlet.java:598)

org.springframework.web.servlet.FrameworkServlet.createWebApplicationContext(FrameworkServlet.java:661)

org.springframework.web.servlet.FrameworkServlet.initWebApplicationContext(FrameworkServlet.java:517)

org.springframework.web.servlet.FrameworkServlet.initServletBean(FrameworkServlet.java:458)

org.springframework.web.servlet.HttpServletBean.init(HttpServletBean.java:138)

javax.servlet.GenericServlet.init(GenericServlet.java:160)