<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
   xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:context="http://www.springframework.org/schema/context"
   xmlns:tx="http://www.springframework.org/schema/tx"
   xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd http://www.springframework.org/schema/context
   http://www.springframework.org/schema/context/spring-context-3.0.xsd http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx-3.0.xsd">

   <context:annotation-config />
   <context:component-scan base-package="......" />
   <context:component-scan base-package="........." />
   <tx:annotation-driven proxy-target-class="true" />

   <bean
      class="org.springframework.beans.factory.config.PropertyPlaceholderConfigurer">
      <property name="location">
         <value>database.properties</value>
      </property>
   </bean>

   <bean id="myDataSource" class="com.mchange.v2.c3p0.ComboPooledDataSource" destroy-method="close">
      <property name="jdbcUrl" value="${db.url}" />
      <property name="driverClass" value="com.mysql.jdbc.Driver" />
      <property name="user" value="${db.username}" />
      <property name="password" value="${db.password}" />
      <property name="preferredTestQuery" value="select 1;" />     
      <property name="initialPoolSize" value="20" />
      <property name="minPoolSize" value="5" />
      <property name="maxPoolSize" value="150" />
      <property name="maxIdleTime" value="1800" />
      <property name="idleConnectionTestPeriod" value="3600" />
   </bean>

   <bean id="mySessionFactory"
      class="org.springframework.orm.hibernate3.annotation.AnnotationSessionFactoryBean">
      <property name="dataSource" ref="myDataSource" />
      <property name="annotatedClasses">
         <list>
            ...................
         </list>
      </property>
      <property name="hibernateProperties">
         <props>
            <prop key="hibernate.dialect">org.hibernate.dialect.MySQLDialect</prop>
            <prop key="hibernate.show_sql">false</prop>
            <prop key="hibernate.hbm2ddl.auto">validate</prop>
         </props>
      </property>
   </bean>

   <bean id="transactionManager"
      class="org.springframework.orm.hibernate3.HibernateTransactionManager">
      <property name="dataSource" ref="myDataSource" />
      <property name="sessionFactory" ref="mySessionFactory" />
   </bean>

</beans>

@Entity
@Table(name = "SchedulingSettings")
public class SchedulingSettings implements Serializable
{
    private static final long serialVersionUID = -8319141036288318816L;

    @Id
    @GeneratedValue
    private int id;

    @Column(name = "name", unique = true, nullable = false)
    private String name;

    @ManyToOne
    @JoinColumn(name = "domainId", unique = false, nullable = false)
    private Domain domain;

    @Enumerated(EnumType.ORDINAL)
    @Column(name = "language", unique = false, nullable = false)
    private Language language;

    @ManyToOne
    @JoinColumn(name = "releaseId", unique = false, nullable = true)
    private ReleaseEntity releaseEntity;

    @Column(name = "maxTimeOfChanges", unique = false, nullable = true, columnDefinition = "timestamp")
    private Date maxTimeOfChanges;

    @ElementCollection(fetch = FetchType.EAGER)
    @Enumerated(EnumType.ORDINAL)
    @CollectionTable(name = "SchedulingSettings_BrowserType")
    @Column(name = "browserTypes", unique = false, nullable = false, columnDefinition = "binary")
    private Set<BrowserType> browserTypes;

    @ManyToOne
    @JoinColumn(name = "testCaseId", unique = false, nullable = true)
    private TestCase testCase;

    @ManyToOne
    @JoinColumn(name = "testSuiteId", unique = false, nullable = true)
    private TestSuite testSuite;

///  ..... getters / setters / helper methods
}

INFO: org.hibernate.LazyInitializationException: failed to lazily initialize a collection, no session or session was closed
org.hibernate.LazyInitializationException: failed to lazily initialize a collection, no session or session was closed
   at org.hibernate.collection.AbstractPersistentCollection.throwLazyInitializationException(AbstractPersistentCollection.java:383)
   at org.hibernate.collection.AbstractPersistentCollection.throwLazyInitializationExceptionIfNotConnected(AbstractPersistentCollection.java:375)
   at org.hibernate.collection.AbstractPersistentCollection.initialize(AbstractPersistentCollection.java:368)
   at org.hibernate.collection.PersistentSet.add(PersistentSet.java:212)
   at com.sun.faces.renderkit.html_basic.MenuRenderer.convertSelectManyValuesForModel(MenuRenderer.java:382)
   at com.sun.faces.renderkit.html_basic.MenuRenderer.convertSelectManyValue(MenuRenderer.java:129)
   at com.sun.faces.renderkit.html_basic.MenuRenderer.getConvertedValue(MenuRenderer.java:315)
   at org.primefaces.component.selectcheckboxmenu.SelectCheckboxMenuRenderer.getConvertedValue(SelectCheckboxMenuRenderer.java:35)
   at javax.faces.component.UIInput.getConvertedValue(UIInput.java:1030)
   at javax.faces.component.UIInput.validate(UIInput.java:960)
   at javax.faces.component.UIInput.executeValidate(UIInput.java:1233)
   at javax.faces.component.UIInput.processValidators(UIInput.java:698)
   at javax.faces.component.UIComponentBase.processValidators(UIComponentBase.java:1214)
   at org.primefaces.component.celleditor.CellEditor.processValidators(CellEditor.java:83)
   at javax.faces.component.UIComponentBase.processValidators(UIComponentBase.java:1214)
   at org.primefaces.component.api.UIData.process(UIData.java:312)
   at org.primefaces.component.api.UIData.processChildren(UIData.java:297)