Erro hibernate org.hibernate.AnnotationException: Illegal attempt to map a non collection as a @OneToMany, @ManyToMany

Boa noite,

Estou tentando criar as tabelas no banco de dados, utilizando os conhecimentos adquiridos até o momento no curso de Hibernate, porem tenho recebido a seguinte mensagem de erro:

mar 08, 2016 9:38:29 PM org.hibernate.annotations.common.Version <clinit>
INFO: HCANN000001: Hibernate Commons Annotations {4.0.1.Final}
mar 08, 2016 9:38:29 PM org.hibernate.Version logVersion
INFO: HHH000412: Hibernate Core {4.1.8.Final}
mar 08, 2016 9:38:29 PM org.hibernate.cfg.Environment <clinit>
INFO: HHH000206: hibernate.properties not found
mar 08, 2016 9:38:29 PM org.hibernate.cfg.Environment buildBytecodeProvider
INFO: HHH000021: Bytecode provider name : javassist
Exception in thread "main" javax.persistence.PersistenceException: [PersistenceUnit: Associacao] Unable to build EntityManagerFactory
    at org.hibernate.ejb.Ejb3Configuration.buildEntityManagerFactory(Ejb3Configuration.java:915)
    at org.hibernate.ejb.Ejb3Configuration.buildEntityManagerFactory(Ejb3Configuration.java:890)
    at org.hibernate.ejb.HibernatePersistence.createEntityManagerFactory(HibernatePersistence.java:57)
    at javax.persistence.Persistence.createEntityManagerFactory(Persistence.java:63)
    at javax.persistence.Persistence.createEntityManagerFactory(Persistence.java:47)
    at bd.systems.associacao.jpa.TesteJPA.main(TesteJPA.java:19)
Caused by: org.hibernate.AnnotationException: Illegal attempt to map a non collection as a @OneToMany, @ManyToMany or @CollectionOfElements: bd.systems.associacao.model.Colaborador.evento
    at org.hibernate.cfg.annotations.CollectionBinder.getCollectionBinder(CollectionBinder.java:327)
    at org.hibernate.cfg.AnnotationBinder.processElementAnnotations(AnnotationBinder.java:1719)
    at org.hibernate.cfg.AnnotationBinder.processIdPropertiesIfNotAlready(AnnotationBinder.java:766)
    at org.hibernate.cfg.AnnotationBinder.bindClass(AnnotationBinder.java:685)
    at org.hibernate.cfg.Configuration$MetadataSourceQueue.processAnnotatedClassesQueue(Configuration.java:3443)
    at org.hibernate.cfg.Configuration$MetadataSourceQueue.processMetadata(Configuration.java:3397)
    at org.hibernate.cfg.Configuration.secondPassCompile(Configuration.java:1341)
    at org.hibernate.cfg.Configuration.buildSessionFactory(Configuration.java:1737)
    at org.hibernate.ejb.EntityManagerFactoryImpl.<init>(EntityManagerFactoryImpl.java:94)
    at org.hibernate.ejb.Ejb3Configuration.buildEntityManagerFactory(Ejb3Configuration.java:905)
    ... 5 more


Segue o código da minha Entity "Colaborador", a qual tem sido frisada no erro do Hibernate.

     @ManagedBean
     @SessionScoped
     @Entity
     @Table (name="Colaborador")
     public class Colaborador implements java.io.Serializable        {

      @Id @GeneratedValue(strategy=GenerationType.IDENTITY)
      private Integer id;
      private String nome;
      private String endereco;
      private String bairro;
      private String cidade;
      private String estado;
      private String telRes;
      private String telCel;
      @ManyToMany
      @JoinColumn(name = "funcaoId")
      private Funcao funcao;
      @ManyToMany
      @JoinColumn(name = "eventoId")
      private Evento evento;
      private boolean ativo;
      //Getters and setters


E a Entity "Evento".

    @ManagedBean
    @SessionScoped
    @Entity
    @Table (name="Evento")
    public class Evento implements java.io.Serializable {

    @Id @GeneratedValue(strategy=GenerationType.IDENTITY)
    private Integer id;
    private String descricao;
    private int diasProgramacao;
    @Temporal(TemporalType.DATE)
    private LocalDate dataInicioEvento;
    @Temporal(TemporalType.DATE)
    private LocalDate dataFinalEvento;
    private int horario;
    private int duracaoEvento;
    private int qtdeMaximaParticipantes;
    private boolean ativo;
    //Getters and setters

Não consegui compreender sobre o que está ocorrendo para ocasionar nesse problema. Desde já agradeço por qualquer ajuda dos colegas.