Erro ao gerar o banco com hibernate

Assuntos Gerais
#1

Ao tentar gerar o banco via hibernate, alguém já teve esse problema?

log4j:WARN No appenders could be found for logger (org.hibernate.cfg.annotations.Version).
log4j:WARN Please initialize the log4j system properly.
java.lang.ExceptionInInitializerError
Caused by: java.lang.reflect.MalformedParameterizedTypeException
	at sun.reflect.generics.reflectiveObjects.ParameterizedTypeImpl.validateConstructorArguments(Unknown Source)
	at sun.reflect.generics.reflectiveObjects.ParameterizedTypeImpl.<init>(Unknown Source)
	at sun.reflect.generics.reflectiveObjects.ParameterizedTypeImpl.make(Unknown Source)
	at sun.reflect.generics.factory.CoreReflectionFactory.makeParameterizedType(Unknown Source)
	at sun.reflect.generics.visitor.Reifier.visitClassTypeSignature(Unknown Source)
	at sun.reflect.generics.tree.ClassTypeSignature.accept(Unknown Source)
	at sun.reflect.generics.repository.MethodRepository.getReturnType(Unknown Source)
	at java.lang.reflect.Method.getGenericReturnType(Unknown Source)
	at org.hibernate.annotations.common.reflection.java.JavaXClass.getDeclaredMethodProperties(JavaXClass.java:90)
	at org.hibernate.annotations.common.reflection.java.JavaXClass.getDeclaredProperties(JavaXClass.java:106)
	at org.hibernate.annotations.common.reflection.java.JavaXClass.getDeclaredProperties(JavaXClass.java:98)
	at org.hibernate.cfg.AnnotationBinder.addElementsOfAClass(AnnotationBinder.java:1023)
	at org.hibernate.cfg.AnnotationBinder.getElementsToProcess(AnnotationBinder.java:859)
	at org.hibernate.cfg.AnnotationBinder.bindClass(AnnotationBinder.java:666)
	at org.hibernate.cfg.AnnotationConfiguration.processArtifactsOfType(AnnotationConfiguration.java:534)
	at org.hibernate.cfg.AnnotationConfiguration.secondPassCompile(AnnotationConfiguration.java:286)
	at org.hibernate.cfg.Configuration.buildSessionFactory(Configuration.java:1292)
	at org.hibernate.cfg.AnnotationConfiguration.buildSessionFactory(AnnotationConfiguration.java:859)
	at br.com.myproject.hibernate.dao.util.HibernateUtil.<clinit>(HibernateUtil.java:19)
Exception in thread "main"
#2

Já tive mts problemas com hibernate, não lembro desse…
Mais coloque seu código, para ver se eu ou outras pessoas ve o erro no código…

#3