Hibernate not scannig external Entity classes that are bundled in a jar

Question

I am currently working on a web project where i am using hibernate.cfg.xml. Now i a planning to move all entity model classes to a separate jar and then refer the entites from the external jar. Also I am not using Entity Manager anywhere. Am using SessionFactory so have only included hibernate.cfg.xml file.

Below Hibernate.cfg.file has been placed in WEB-INF->classes folder

<?xml version='1.0' encoding='utf-8'?>
<!DOCTYPE hibernate-configuration PUBLIC
        "-//Hibernate/Hibernate Configuration DTD 3.0//EN"
        "http://www.hibernate.org/dtd/hibernate-configuration-3.0.dtd">

<hibernate-configuration>

    <session-factory>

        <!-- Database connection settings -->
        <property name="connection.driver_class">org.sqlite.JDBC</property>

        <property name="connection.url">jdbc:sqlite:C:\workspace\gsepHelpdeskDB.sqlite</property>
        <property name="connection.username"></property>
        <property name="connection.password"/>


            <property name="hibernate.connection.provider_class">
                        org.hibernate.c3p0.internal.C3P0ConnectionProvider</property>
        <property name="hibernate.c3p0.min_size">1</property>
        <property name="hibernate.c3p0.max_size">50</property>
        <property name="hibernate.c3p0.timeout">120</property>
        <property name="hibernate.c3p0.max_statements">10</property>

        <!-- SQL dialect -->
        <property name="dialect">com.enigmabridge.hibernate.dialect.SQLiteDialect</property>

        <!-- Disable the second-level cache  -->
        <property name="cache.provider_class">org.hibernate.cache.internal.NoCacheProvider</property>

        <!-- Echo all executed SQL to stdout -->
        <property name="show_sql">true</property>

        <!-- Drop and re-create the database schema on startup -->
        <!-- <property name="hbm2ddl.auto">create</property> -->

        <!-- Do not Drop, only update the database schema on startup -->
        <property name="hbm2ddl.auto">update</property>

            <!-- <mapping resource="org.hibernateDemo.dto.UserDetails.hbm.xml"/> -->      
    <mapping class="com.daimler.gsep.Tool"/>
    <mapping class="com.daimler.gsep.RequestorInfo"/>



    </session-factory>

</hibernate-configuration>

The entity classes mentioned in mapping tag of hibernate config file are actually placed in a jar named projectAutomationPOJOs.jar. And I have placed the jar in the lib folder. When I am running the application, then I am getting error like "Tool is not mapped".