Add a maven github action

.github/workflows/maven.yml

@@ -0,0 +1,19 @@
+name: Java CI
+
+on: [push]
+
+jobs:
+  build_and_test:
+
+    runs-on: ubuntu-latest
+
+    steps:
+    - uses: actions/checkout@v1
+    - name: Set up JDK 1.8
+      uses: actions/setup-java@v1
+      with:
+        java-version: 1.8
+    - name: Build with Maven
+      run: mvn clean package --file pom.xml
+    - name: Tests with Maven
+      run: mvn test --file pom.xml