create user and database in PostgreSQL
CREATE ROLE dbusername LOGIN NOSUPERUSER INHERIT NOCREATEDB NOCREATEROLE NOREPLICATION;
CREATE DATABASE dbusername WITH OWNER = kb ENCODING = 'UTF8';
configure database connection settings in src/main/java/hibernate.cfg.xml
<property name="hibernate.connection.url">jdbc:postgresql://HOSTNAME/DATABASE</property>
<property name="hibernate.connection.username">DBUSERNAME</property>
<property name="hibernate.connection.password">DBPASSWORD</property>
start web container
mvn jetty:run
browse http://127.0.0.1:8080
load simple data from data.xml