os: linux
dist: trusty
language: java
install: true
jdk:
  - openjdk7
  - openjdk8
  - openjdk9
cache:
  directories:
    - $HOME/.m2
script: ./mvnw clean verify

os: linux
dist: trusty
language: java
install: true
jdk:
  - openjdk7
  - openjdk8
  - oraclejdk11
cache:
  directories:
    - $HOME/.m2
script: ./mvnw clean verify

Test against OpenJDK7, OpenJDK8 and OracleJDK11
Test against OpenJDK7, OpenJDK8 and OracleJDK11