If you are compiling a class having package like
package com.example.web;
So some needful like compile from the folder where these classes are,so if classes are in folder src,go till src and then compile.In your case you did a mistake that you are compiling one folder up from the desired one.
E:\progms\java\scwcdtests\beerV1\src>javac -d classes com/example/model/BeerExpert.java
Set the classpath to all the library required to compile and also the current directory.
SET CLASSPATH=%CLASSPATH%;E:\progms\java\scwcdtests\beerV1\classes;.(look at the .)