enable github action
diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
new file mode 100644
index 0000000..8b36286
--- /dev/null
+++ b/.github/workflows/ci.yml
@@ -0,0 +1,12 @@
+name: CI
+
+on: [push, pull_request]
+
+jobs:
+  build:
+    runs-on: ubuntu-latest
+    strategy:
+      matrix:
+        java: [ 1.8, 11 ]
+    steps:
+      - uses: actions/checkout@v2