Create maven.yml to add CI actions (#6)

* Create maven.yml

Add a CI check for Ubuntu x86_64 running on 8, 11 and latest.

Author: Craigacp

.github/workflows/maven.yml

@@ -0,0 +1,28 @@
+  
+# This workflow will build a Java project with Maven
+# For more information see: https://help.github.com/actions/language-and-framework-guides/building-and-testing-java-with-maven
+
+name: OLCUT CI, OpenJDK 8, 11 and latest - Ubuntu x86_64
+
+on:
+  push:
+    branches: [ main, develop ]
+  pull_request:
+    branches: [ main, develop ]
+
+jobs:
+  build:
+    runs-on: ubuntu-latest
+    strategy:
+      matrix:
+        # test against supported LTS versions and latest
+        java: [ 8, 11, 14 ]
+    name: OLCUT - OpenJDK ${{ matrix.java }}
+    steps:
+      - uses: actions/checkout@v2
+      - name: Setup OpenJDK
+        uses: actions/setup-java@v1
+        with:
+          java-version: ${{ matrix.java }}
+      - name: Build with Maven
+        run: mvn -B package --file pom.xml