Kotlin data class + JPA

Application.kt

package org.sapzil

import org.springframework.boot.autoconfigure.SpringBootApplication

@SpringBootApplication
open class Application

build.gradle

group 'org.sapzil'
version '1.0-SNAPSHOT'

buildscript {
    ext.kotlin_version = '1.1.51'

    repositories {
        mavenCentral()
    }
    dependencies {
        classpath "org.jetbrains.kotlin:kotlin-gradle-plugin:$kotlin_version"
        classpath "org.springframework.boot:spring-boot-gradle-plugin:1.5.7.RELEASE"
    }
}

apply plugin: 'java'
apply plugin: 'kotlin'
apply plugin: 'org.springframework.boot'

sourceCompatibility = 1.8

repositories {
    mavenCentral()
}

dependencies {
    compile "org.jetbrains.kotlin:kotlin-stdlib-jre8:$kotlin_version"
    compile "org.springframework.boot:spring-boot-starter-data-jpa"
    compile "com.h2database:h2"
    testCompile "org.springframework.boot:spring-boot-starter-test"
}

compileKotlin {
    kotlinOptions.jvmTarget = "1.8"
}
compileTestKotlin {
    kotlinOptions.jvmTarget = "1.8"
}

How's terrible!!!!!It let me full of throw.><