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You can use the following code to handle org.hibernate.internal.util.config.ConfigurationException in Java 8:

import java.util.Optional;

import org.hibernate.internal.util.config.ConfigurationException;

public class HibernateExample {

    public static void main(String[] args) {
        try {
            // Your Hibernate code here
        } catch (ConfigurationException ce) {
            Optional.ofNullable(ce.getCause()).ifPresent(cause -> {
                System.out.println("Root cause: " + cause.getMessage());
            });
        }
    }
}

In the catch block, you can use the Optional class to check if the cause of the exception is present, and if it is, print its message. The Optional class allows you to write more concise and readable code, while avoiding null checks.

Note that the specific handling of the exception will depend on your application requirements and use case. This is just an example of how you can use Java 8 features to handle the Hibernate ConfigurationException.