Erro classe java

<?xml version="1.0"?>
<web-app version="2.4" xmlns="http://java.sun.com/xml/ns/j2ee"
	xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
	xsi:schemaLocation="http://java.sun.com/xml/ns/j2ee  
	                    http://java.sun.com/xml/ns/j2ee/web-app_2_4.xsd">
	<display-name>FinanceiroWeb</display-name>

	<filter>
		<filter-name>conexaoFiter</filter-name>
		<filter-class>financeiro.web.filter.ConexaoHibernateFilter</filter-class>
	</filter>
	<filter-mapping>
		<filter-name>conexaoFiter</filter-name>
		<url-pattern>*.jsf</url-pattern>
	</filter-mapping>


	<!-- FACELETS -->
	<!-- Use Documents Saved as *.xhtml -->
	<context-param>
		<param-name>javax.faces.DEFAULT_SUFFIX</param-name>
		<param-value>.xhtml</param-value>
	</context-param>
	<!-- Special Debug Output for Development -->
	<context-param>
		<param-name>facelets.DEVELOPMENT</param-name>
		<param-value>true</param-value>
	</context-param>

	<!-- Faces Servlet -->
	<servlet>
		<servlet-name>Faces Servlet</servlet-name>
		<servlet-class>javax.faces.webapp.FacesServlet</servlet-class>
		<load-on-startup>1</load-on-startup>
	</servlet>

	<!-- Faces Servlet Mapping -->
	<servlet-mapping>
		<servlet-name>Faces Servlet</servlet-name>
		<url-pattern>*.jsf</url-pattern>
	</servlet-mapping>

	<welcome-file-list>
		<welcome-file>index.html</welcome-file>
		<welcome-file>index.htm</welcome-file>
		<welcome-file>index.jsp</welcome-file>
		<welcome-file>default.html</welcome-file>
		<welcome-file>default.htm</welcome-file>
		<welcome-file>default.jsp</welcome-file>
	</welcome-file-list>
</web-app>

package financeiro.web.filter;

import javax.servlet.Filter;
import javax.servlet.FilterChain;
import javax.servlet.FilterConfig;
import javax.servlet.ServletException;
import javax.servlet.ServletRequest;
import javax.servlet.ServletResponse;

import org.hibernate.SessionFactory;



import financeiro.util.HibernateUtil;

public class ConexaoHibernateFilter implements Filter {
	
	private SessionFactory	sf;

	public void init(FilterConfig config) throws ServletException {
		
		this.sf = HibernateUtil.getSessionFactory();
	}

	public void destroy() {
	}

	public void doFilter(ServletRequest servletRequest, ServletResponse servletResponse, FilterChain chain) throws ServletException {

		try {

			this.sf.getCurrentSession().beginTransaction();

			chain.doFilter(servletRequest, servletResponse);

			this.sf.getCurrentSession().getTransaction().commit();
			this.sf.getCurrentSession().close();

		} catch (Throwable ex) {
			try {
				if (this.sf.getCurrentSession().getTransaction().isActive()) {
					this.sf.getCurrentSession().getTransaction().rollback();
				}
			} catch (Throwable t) {
				t.printStackTrace();
			}
			throw new ServletException(ex);
		}
	}

}

Fev 07, 2013 11:04:20 PM org.apache.catalina.startup.Catalina load
INFO: Initialization processed in 732 ms
Fev 07, 2013 11:04:20 PM org.apache.catalina.core.StandardService start
INFO: Starting service Catalina
Fev 07, 2013 11:04:20 PM org.apache.catalina.core.StandardEngine start
INFO: Starting Servlet Engine: Apache Tomcat/6.0.36
Fev 07, 2013 11:04:21 PM com.sun.faces.config.ConfigureListener contextInitialized
INFO: Inicializando Mojarra 2.0.2 (FCS b10) para o contexto '/FinanceiroWeb'
Fev 07, 2013 11:04:22 PM org.apache.catalina.core.StandardContext filterStart
SEVERE: Exception starting filter conexaoFiter
java.lang.NoClassDefFoundError: Lorg/hibernate/SessionFactory;
	at java.lang.Class.getDeclaredFields0(Native Method)
	at java.lang.Class.privateGetDeclaredFields(Unknown Source)
	at java.lang.Class.getDeclaredFields(Unknown Source)
	at org.apache.catalina.util.DefaultAnnotationProcessor.processAnnotations(DefaultAnnotationProcessor.java:181)
	at org.apache.catalina.core.ApplicationFilterConfig.getFilter(ApplicationFilterConfig.java:279)
	at org.apache.catalina.core.ApplicationFilterConfig.setFilterDef(ApplicationFilterConfig.java:422)
	at org.apache.catalina.core.ApplicationFilterConfig.<init>(ApplicationFilterConfig.java:115)
	at org.apache.catalina.core.StandardContext.filterStart(StandardContext.java:4072)
	at org.apache.catalina.core.StandardContext.start(StandardContext.java:4726)
	at org.apache.catalina.core.ContainerBase.start(ContainerBase.java:1057)
	at org.apache.catalina.core.StandardHost.start(StandardHost.java:840)
	at org.apache.catalina.core.ContainerBase.start(ContainerBase.java:1057)
	at org.apache.catalina.core.StandardEngine.start(StandardEngine.java:463)
	at org.apache.catalina.core.StandardService.start(StandardService.java:525)
	at org.apache.catalina.core.StandardServer.start(StandardServer.java:754)
	at org.apache.catalina.startup.Catalina.start(Catalina.java:595)
	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
	at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
	at java.lang.reflect.Method.invoke(Unknown Source)
	at org.apache.catalina.startup.Bootstrap.start(Bootstrap.java:289)
	at org.apache.catalina.startup.Bootstrap.main(Bootstrap.java:414)
Caused by: java.lang.ClassNotFoundException: org.hibernate.SessionFactory
	at org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1680)
	at org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1526)
	... 22 more