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java.lang.NullPointerException: 	at org.neo4j.ogm.entity.io.EntityAccessManager.getRelationalReaders(EntityAccessManager.java:355)	at org.neo4j.ogm.context.EntityGraphMapper.bothWayMappingRequired(EntityGraphMapper.java:893)	at org.neo4j.ogm.context.EntityGraphMapper.mapEntityReferences(EntityGraphMapper.java:396)	at org.neo4j.ogm.context.EntityGraphMapper.mapEntity(EntityGraphMapper.java:230)	at org.neo4j.ogm.context.EntityGraphMapper.map(EntityGraphMapper.java:134)	at org.neo4j.ogm.session.delegates.SaveDelegate.save(SaveDelegate.java:83)	at org.neo4j.ogm.session.delegates.SaveDelegate.save(SaveDelegate.java:44)	at org.neo4j.ogm.session.Neo4jSession.save(Neo4jSession.java:419)	at sun.reflect.GeneratedMethodAccessor61.invoke(Unknown Source)	at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)	at java.lang.reflect.Method.invoke(Unknown Source)	at org.springframework.data.neo4j.transaction.SharedSessionCreator$SharedSessionInvocationHandler.invoke(SharedSessionCreator.java:133)	at com.sun.proxy.$Proxy115.save(Unknown Source)	at org.springframework.data.neo4j.repository.support.SimpleGraphRepository.save(SimpleGraphRepository.java:70)	at sun.reflect.GeneratedMethodAccessor60.invoke(Unknown Source)	at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)	at java.lang.reflect.Method.invoke(Unknown Source)	at org.springframework.data.repository.core.support.RepositoryFactorySupport$QueryExecutorMethodInterceptor.executeMethodOn(RepositoryFactorySupport.java:503)	at org.springframework.data.repository.core.support.RepositoryFactorySupport$QueryExecutorMethodInterceptor.doInvoke(RepositoryFactorySupport.java:488)	at org.springframework.data.repository.core.support.RepositoryFactorySupport$QueryExecutorMethodInterceptor.invoke(RepositoryFactorySupport.java:460)	at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:179)	at org.springframework.data.projection.DefaultMethodInvokingMethodInterceptor.invoke(DefaultMethodInvokingMethodInterceptor.java:61)	at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:179)	at org.springframework.transaction.interceptor.TransactionInterceptor$1.proceedWithInvocation(TransactionInterceptor.java:99)	at org.springframework.transaction.interceptor.TransactionAspectSupport.invokeWithinTransaction(TransactionAspectSupport.java:281)	at org.springframework.transaction.interceptor.TransactionInterceptor.invoke(TransactionInterceptor.java:96)	at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:179)	at org.springframework.dao.support.PersistenceExceptionTranslationInterceptor.invoke(PersistenceExceptionTranslationInterceptor.java:136)	at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:179)	at org.springframework.aop.interceptor.ExposeInvocationInterceptor.invoke(ExposeInvocationInterceptor.java:92)	at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:179)	at org.springframework.aop.framework.JdkDynamicAopProxy.invoke(JdkDynamicAopProxy.java:213)	at com.sun.proxy.$Proxy128.save(Unknown Source)	at com.decisionwanted.domain.dao.decision.CharacteristicOptionDaoImpl.createOrUpdate(CharacteristicOptionDaoImpl.java:44)	at com.decisionwanted.domain.dao.decision.CharacteristicOptionDaoImpl.create(CharacteristicOptionDaoImpl.java:24)	at com.decisionwanted.domain.DecisionCharacteristicTest.testDecisionCharacteristicOptions(DecisionCharacteristicTest.java:109)	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)	at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)	at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)	at java.lang.reflect.Method.invoke(Unknown Source)	at org.junit.runners.model.FrameworkMethod$1.runReflectiveCall(FrameworkMethod.java:50)	at org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:12)	at org.junit.runners.model.FrameworkMethod.invokeExplosively(FrameworkMethod.java:47)	at org.junit.internal.runners.statements.InvokeMethod.evaluate(InvokeMethod.java:17)	at org.junit.internal.runners.statements.RunBefores.evaluate(RunBefores.java:26)	at org.springframework.test.context.junit4.statements.RunBeforeTestMethodCallbacks.evaluate(RunBeforeTestMethodCallbacks.java:75)	at org.springframework.test.context.junit4.statements.RunAfterTestMethodCallbacks.evaluate(RunAfterTestMethodCallbacks.java:86)	at org.springframework.test.context.junit4.statements.SpringRepeat.evaluate(SpringRepeat.java:84)	at org.junit.runners.ParentRunner.runLeaf(ParentRunner.java:325)	at org.springframework.test.context.junit4.SpringJUnit4ClassRunner.runChild(SpringJUnit4ClassRunner.java:252)	at org.springframework.test.context.junit4.SpringJUnit4ClassRunner.runChild(SpringJUnit4ClassRunner.java:94)	at org.junit.runners.ParentRunner$3.run(ParentRunner.java:290)	at org.junit.runners.ParentRunner$1.schedule(ParentRunner.java:71)	at org.junit.runners.ParentRunner.runChildren(ParentRunner.java:288)	at org.junit.runners.ParentRunner.access$000(ParentRunner.java:58)	at org.junit.runners.ParentRunner$2.evaluate(ParentRunner.java:268)	at org.springframework.test.context.junit4.statements.RunBeforeTestClassCallbacks.evaluate(RunBeforeTestClassCallbacks.java:61)	at org.springframework.test.context.junit4.statements.RunAfterTestClassCallbacks.evaluate(RunAfterTestClassCallbacks.java:70)	at org.junit.runners.ParentRunner.run(ParentRunner.java:363)	at org.springframework.test.context.junit4.SpringJUnit4ClassRunner.run(SpringJUnit4ClassRunner.java:191)	at org.eclipse.jdt.internal.junit4.runner.JUnit4TestReference.run(JUnit4TestReference.java:86)	at org.eclipse.jdt.internal.junit.runner.TestExecution.run(TestExecution.java:38)	at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:459)	at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:678)	at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.run(RemoteTestRunner.java:382)	at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.main(RemoteTestRunner.java:192)