CSV_FileConfig fileConfig = new CSV_FileConfig();
fileConfig.setURI( URI );
fileConfig.setDelimiter( delimiter );
fileConfig.setTitle( isTitle );

<sequence-generator name="pkFileConfig" sequence-name="CSV_FILE_CONFIGS_ID_SEQ" allocation-size="1" initial-value="1" />
<entity class="CSV_FileConfig" name="CSV_FileConfig" metadata-complete="false">
	<table name="CSV_FILE_CONFIGS"/>
	<attributes>
		<id name="id">
			<column name="ID" nullable="false"/>
			<generated-value strategy="SEQUENCE" generator="pkFileConfig" />
		</id>
		<basic name="URI" optional="true">
			<column name="URI"/>
		</basic>
		<basic name="delimiter" optional="true">
			<column name="DELIMITER"/>
		</basic>
		<basic name="title">
			<column name="IS_TITLE"/>
		</basic>
		<basic name="colCount">
			<column name="COL_COUNT"/>
		</basic>
		<one-to-many name="columnConfigList" mapped-by="fileConfig" target-entity="com.bs.amg.test.persistence.CSV_ColumnConfig" fetch="LAZY">
			<cascade>
				<cascade-refresh/>
			</cascade>
		</one-to-many>
	</attributes>
</entity>

protected CSV_FileConfig saveFileConfig( CSV_FileConfig fileConfig ) throws Exception
{
	// entityManager.persist( fileConfig );
	fileConfig = entityManager.merge( fileConfig );

	return fileConfig;
}

17:32:13,113 ERROR [stderr] (http--127.0.0.1-8080-1) java.lang.NullPointerException

17:32:13,115 ERROR [stderr] (http--127.0.0.1-8080-1) 	at CSV_Creator.saveFileConfig(CSV_Creator.java:59)

public class CSV_Creator{
   String afield;
   public static void main(String[] args){
       System.out.println(new CSV_Creator().afield);
   }
}

@Stateless(name = "TestEJB")
public class TestBean {
	@PersistenceContext( unitName = "manager1" )
	EntityManager entityManager;

	public void foo() throws IOException{ entityManager.persist( new EntityBean() ); }
}

@EJB
TestBean bean;

public void bar() {
	TestNotBean testNotBean = new TestNotBean();
}

public class TestNotBean {
	@PersistenceContext( unitName = "manager1" )
	EntityManager entityManager;

	public void foo() { entityManager.persist( new EntityBean() ); }
}