Add workflow for master and pr's

.github/workflows/ci-maven-master.yml

@@ -0,0 +1,33 @@
+name: Java CI - master
+
+on:
+  push:
+    branches:
+      - master
+  pull_request:
+    branches:
+      - master
+
+jobs:
+  build:
+
+    runs-on: ${{ matrix.os }}
+    strategy:
+      matrix:
+        os: [ubuntu-latest]
+
+    steps:
+    - uses: actions/checkout@v1
+    - name: Cache maven repository
+      uses: actions/cache@v1
+      with:
+        path: .m2
+        key: ${{ runner.os }}-m2-${{ hashFiles('**/pom.xml') }}
+        restore-keys: |
+          ${{ runner.os }}-m2-
+    - name: Set up JDK 1.8
+      uses: actions/setup-java@v1
+      with:
+        java-version: 1.8
+    - name: Build with Maven
+      run: mvn "-Dmaven.repo.local=.m2" -U -B package