build.gradle

// Top-level build file where you can add configuration options common to all sub-projects/modules.
apply plugin: 'com.github.ben-manes.versions'

buildscript {
    repositories {
        jcenter()
    }
    dependencies {
        // NOTE: Do not place your application dependencies here; they belong
        // in the individual module build.gradle files
        classpath 'com.github.ben-manes:gradle-versions-plugin:0.15.0'
    }
}

allprojects {
    repositories {
        mavenCentral()
        jcenter()
    }
}

subprojects {
    apply plugin: 'java'
    apply plugin: 'maven'

    sourceCompatibility = 1.7 // java 7
    targetCompatibility = 1.7

    task sourcesJar(type: Jar, dependsOn: classes) {
        classifier = 'sources'
        from sourceSets.main.allSource
    }

    task javadocJar(type: Jar, dependsOn: javadoc) {
        classifier = 'javadoc'
        from javadoc.destinationDir
    }

    artifacts {
        archives sourcesJar
        archives javadocJar
    }
}

task runExample() {
    dependsOn ':example:runSimple'
}

defaultTasks 'runExample'