Requires a bean named 'entityManagerFactory' after using `CrudRepository? - spring

Question

I don't know why but as I use CrudRepository in my Spring Boot Application:
public interface UserGroupRepository extends CrudRepository<UserGroupModel, Long> {
}
I'm getting this at the startup:
***************************
APPLICATION FAILED TO START
***************************
Description:
Parameter 0 of constructor in
springfox.documentation.spring.web.plugins.WebMvcRequestHandlerProvider
required a bean named 'entityManagerFactory' that could not be found.
Action:
Consider defining a bean named 'entityManagerFactory' in your configuration.
I have no idea what SpringFox has to do with this but as I comment out // extends CrudRepository .. things start working again.
Is Swagger interfering here with Spring Data?
See the full auto configuration report.
See the full trace.
The pom.xml I am using:
<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
<modelVersion>4.0.0</modelVersion>
<parent>
<artifactId>server</artifactId>
<groupId>mahlzeit</groupId>
<version>1.0-SNAPSHOT</version>
</parent>
<artifactId>api</artifactId>
<properties>
<spring.boot.version>2.0.0.M5</spring.boot.version>
<hibernate.core.version>5.2.12.Final</hibernate.core.version>
</properties>
<!-- Dependency Management -->
<dependencyManagement>
<dependencies>
<!-- Import dependency management from Spring Boot -->
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-dependencies</artifactId>
<version>${spring.boot.version}</version>
<type>pom</type>
<scope>import</scope>
</dependency>
</dependencies>
</dependencyManagement>
<!-- Dependencies -->
<dependencies>
<!-- Spring Framework Boot -->
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-web</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-security</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-data-jpa</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-devtools</artifactId>
</dependency>
<!-- Spring Framework -->
<dependency>
<groupId>org.springframework.security</groupId>
<artifactId>spring-security-jwt</artifactId>
<version>1.0.8.RELEASE</version>
</dependency>
<dependency>
<groupId>org.springframework.security.oauth</groupId>
<artifactId>spring-security-oauth2</artifactId>
<version>2.2.0.RELEASE</version>
</dependency>
<!-- PostgreSQL Driver -->
<dependency>
<groupId>postgresql</groupId>
<artifactId>postgresql</artifactId>
<version>9.4.1208-jdbc42-atlassian-hosted</version>
</dependency>
<!-- Swagger -->
<dependency>
<groupId>io.springfox</groupId>
<artifactId>springfox-swagger2</artifactId>
<version>2.7.0</version>
</dependency>
<dependency>
<groupId>io.springfox</groupId>
<artifactId>springfox-swagger-ui</artifactId>
<version>2.7.0</version>
</dependency>
<!-- Misc. -->
<dependency>
<groupId>commons-dbcp</groupId>
<artifactId>commons-dbcp</artifactId>
<version>1.4</version>
</dependency>
<dependency>
<groupId>com.jayway.jsonpath</groupId>
<artifactId>json-path</artifactId>
<scope>test</scope>
</dependency>
<dependency>
<groupId>com.fasterxml.jackson.datatype</groupId>
<artifactId>jackson-datatype-jsr310</artifactId>
<version>2.9.2</version>
</dependency>
</dependencies>
<!-- Build -->
<build>
<plugins>
<plugin>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-maven-plugin</artifactId>
</plugin>
</plugins>
</build>
<!-- Maven Repositories -->
<repositories>
<!-- Required since this is currently using Spring RC version -->
<repository>
<id>spring-milestones</id>
<name>Spring Milestones</name>
<url>https://repo.spring.io/libs-milestone</url>
<snapshots>
<enabled>false</enabled>
</snapshots>
</repository>
</repositories>
</project>