http://www.bouncycastle.org/java.html: The Bouncy Castle Crypto package is a Java implementation of cryptographic algorithms. This jar contains JCE provider and lightweight API for the Bouncy Castle Cryptography APIs for JDK 1.5. 
package org.bouncycastle.util;

public class StoreException
    extends RuntimeException
{
    private Throwable _e;

    public StoreException(String s, Throwable e)
    {
        super(s);
        _e = e;
    }

    public Throwable getCause()
    {
        return _e;
    }
}