maven compile ejb example error

[newbie_tw]

I follow the example from 
http://cwiki.apache.org/GMOxDOC20/very-simple-entity-ejb-example.html. Whilst 
compiling the source, the maven issues error with 

cannot find symbol
symbol  : class Stateless
location: package javax.ejb

I think that is because the bean class import the javax.ejb.Stateless class 
which can not be found even by including dependency as follow:

        <dependency>
            <groupId>org.apache.geronimo.specs</groupId>
            <artifactId>geronimo-j2ee_1.4_spec</artifactId>
            <version>1.0</version>
            <scope>provided</scope>
        </dependency>

The unzipped jar shows no Stateless class file in the geronimo-j2ee_1.4_spec.jar

What should I do in order to get the source compiled correctly?

Thank you very much


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