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 to JDK 1.8.
  • The Legion of the Bouncy Castle Inc. 
package org.bouncycastle.crypto.tls;

import java.io.IOException;

public class TlsException
    extends IOException
{
    // TODO Some day we might be able to just pass this down to IOException (1.6+)
    protected Throwable cause;

    public TlsException(String message, Throwable cause)
    {
        super(message);

        this.cause = cause;
    }

    public Throwable getCause()
    {
        return cause;
    }
}