my-gradle-plugins/executable-jar/executable-jar-common/build.gradle

plugins {
    id 'java-library'
}

java {
    sourceCompatibility = JavaVersion.VERSION_1_8
    targetCompatibility = JavaVersion.VERSION_1_8
}

jar {
    manifest {
        attributes "Automatic-Module-Name" : "net.woggioni.executable.jar"
    }
}