build.gradle

allprojects {
    apply plugin: 'java'
    apply plugin: 'checkstyle'

    repositories {
        jcenter()
        mavenCentral()
    }

    project.ext {
        checkstyleVersion = '7.1.2'
    }

    checkstyle {
        toolVersion = "$checkstyleVersion"
    }

    sourceSets {
        main {
            java {
                srcDirs = ['src']
            }
        }
        test {
            java {
                srcDirs = ['test/java']
            }
        }
    }

    dependencies {
        testCompile 'junit:junit:4.12'
    }
}

task wrapper(type: Wrapper) {
    gradleVersion = '2.12'
}