Implement Bazel build

Change-Id: I74da3f186e166aae5070b7458ade3f12714d8548
diff --git a/BUILD b/BUILD
new file mode 100644
index 0000000..c3468f3
--- /dev/null
+++ b/BUILD
@@ -0,0 +1,11 @@
+load('//tools/bzl:plugin.bzl', 'gerrit_plugin')
+
+gerrit_plugin(
+  name = 'download-commands',
+  srcs = glob(['src/main/java/**/*.java']),
+  resources = glob(['src/main/resources/**/*']),
+  manifest_entries = [
+    'Gerrit-PluginName: download-commands',
+    'Gerrit-Module: com.googlesource.gerrit.plugins.download.Module'
+  ]
+)