Spring Boot - No bean named 'entityManagerFactory' available

Question

I have a simple Spring Boot based web application which uses JPA and HSQLDB for data persistence, but now when I try to build my Project, it fails and says:

No bean named 'entityManagerFactory' available

My code is as follows:

Application

import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.scheduling.annotation.EnableScheduling;

@SpringBootApplication
@EnableScheduling
public class Application {

    public static void main(String[] args) {
        SpringApplication.run(Application.class, args);
    }
}

"Comentario" table

package dashboard.model;

import java.util.Date;

import javax.persistence.*;

@Entity
@Table(name="TComentarios")
public class Comentario {

    @Id
    @GeneratedValue(strategy = GenerationType.IDENTITY)
    private Long id;
    private String contenido;
    @ManyToOne
    private Sugerencia sugerencia;
    @ManyToOne
    private Usuario usuario;
    @Temporal(TemporalType.DATE)
    private Date fecha;

    Comentario(){}

    get/set...
}

Repository

import java.util.List;

import org.springframework.data.jpa.repository.JpaRepository;
import org.springframework.data.jpa.repository.Query;
import org.springframework.stereotype.Repository;

@Repository
public interface ComentarioRepository extends JpaRepository<Comentario, Long>{
@Query("select c from Comentario c where c.sugerencia = ?1")
List<Comentario> findBySugerencia(Sugerencia sugerencia);
}

pom.xml (dependencies part):

<parent>
    <groupId>org.springframework.boot</groupId>
    <artifactId>spring-boot-starter-parent</artifactId>
    <version>1.4.4.RELEASE</version>
</parent>

<dependencies>
    <dependency>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-web</artifactId>
    </dependency>

    <dependency>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-test</artifactId>
        <scope>test</scope>
    </dependency>

    <dependency>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-data-rest</artifactId>
    </dependency>

    <dependency>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-devtools</artifactId>
        <optional>true</optional>
    </dependency>

    <dependency>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-thymeleaf</artifactId>
    </dependency>

    <dependency>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-data-jpa</artifactId>
        <version>1.5.2.RELEASE</version>
    </dependency>

    <dependency>
        <groupId>org.hsqldb</groupId>
        <artifactId>hsqldb</artifactId>
    </dependency>

    <dependency>
        <groupId>org.springframework.cloud</groupId>
        <artifactId>spring-cloud-starter-bus-kafka</artifactId>
        <version>1.2.2.RELEASE</version>
    </dependency>

    <dependency>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-websocket</artifactId>
    </dependency>

    <dependency>
        <groupId>org.webjars</groupId>
        <artifactId>webjars-locator</artifactId>
    </dependency>

    <dependency>
        <groupId>org.webjars</groupId>
        <artifactId>sockjs-client</artifactId>
        <version>1.0.2</version>
    </dependency>

    <dependency>
        <groupId>org.webjars</groupId>
        <artifactId>stomp-websocket</artifactId>
        <version>2.3.3</version>
    </dependency>

    <dependency>
        <groupId>org.webjars</groupId>
        <artifactId>jquery</artifactId>
        <version>3.2.0</version><!--$NO-MVN-MAN-VER$-->
    </dependency>

    <dependency>
        <groupId>com.fasterxml.jackson.dataformat</groupId>
        <artifactId>jackson-dataformat-xml</artifactId>
    </dependency>

    <dependency>
        <groupId>org.codehaus.woodstox</groupId>
        <artifactId>woodstox-core-asl</artifactId>
        <version>4.4.1</version>
    </dependency>

</dependencies>

Answer 1

It will maybe not solve your problem but overriding the dependency version of artifact pulled by the spring-boot-starter-parent pom is not advised and may create side effects:

<parent>
    <groupId>org.springframework.boot</groupId>
    <artifactId>spring-boot-starter-parent</artifactId>
    <version>1.4.4.RELEASE</version>
</parent>    
 ....    
<dependency>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-data-jpa</artifactId>
        <version>1.5.2.RELEASE</version>
</dependency>

It should be enough :

<dependency>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-data-jpa</artifactId>
</dependency>

It is true for most of dependencies pulled by the starter pom but it is still more true for dependencies belonging to the org.springframework.boot groupId that are designed to work with the same version.