Add Github workflow

.github/workflows/maven.yml

@@ -0,0 +1,36 @@
+name: Java CI with Maven
+
+on:
+  push:
+    branches:
+      - master
+  pull_request:
+    branches:
+      - master
+
+jobs:
+  test:
+    runs-on: ubuntu-latest
+    strategy:
+      matrix:
+        java: [ 8, 11, 12, 13 ]
+    name: Java ${{ matrix.java }} compile
+    steps:
+      - uses: actions/checkout@master
+
+      - name: Cache maven dependencies
+        uses: actions/cache@v1
+        env:
+          cache-name: cache-maven-dependencies
+        with:
+          path: ~/.m2
+          key: ${{ runner.os }}-build-${{ env.cache-name }}-${{ hashFiles('**/pom.xml') }}
+          restore-keys: |
+            ${{ runner.os }}-build-${{ env.cache-name }}-
+
+      - name: Setup java
+        uses: actions/setup-java@v1
+        with:
+          java-version: ${{ matrix.java }}
+
+      - run: mvn test