Unable to configure EntityManagerFactory hibernate.cfg.xml not found

Exception in thread "main" javax.persistence.PersistenceException: [PersistenceUnit: testuser] Unable to configure EntityManagerFactory
at org.hibernate.ejb.Ejb3Configuration.configure(Ejb3Configuration.java:378)
at org.hibernate.ejb.HibernatePersistence.createEntityManagerFactory(HibernatePersistence.java:56)
at javax.persistence.Persistence.createEntityManagerFactory(Persistence.java:63)
at javax.persistence.Persistence.createEntityManagerFactory(Persistence.java:47)
at main.TestUser.main(TestUser.java:19)
Caused by: org.hibernate.HibernateException: /hibernate.cfg.xml not found
at org.hibernate.util.ConfigHelper.getResourceAsStream(ConfigHelper.java:170)
at org.hibernate.cfg.Configuration.getConfigurationInputStream(Configuration.java:2176)
at org.hibernate.cfg.Configuration.configure(Configuration.java:2157)
at org.hibernate.cfg.AnnotationConfiguration.configure(AnnotationConfiguration.java:212)
at org.hibernate.ejb.Ejb3Configuration.configure(Ejb3Configuration.java:999)
at org.hibernate.ejb.Ejb3Configuration.configure(Ejb3Configuration.java:282)
at org.hibernate.ejb.Ejb3Configuration.configure(Ejb3Configuration.java:366)
... 4 more

Solution:

Place the hibernate.cfg.xml in the root of the project classpath.