Initial BUCK build

Change-Id: I64e8a979301989062f4545a4841b06c15a372049
diff --git a/buck-tools/java_sources.defs b/buck-tools/java_sources.defs
new file mode 100644
index 0000000..0b3974e
--- /dev/null
+++ b/buck-tools/java_sources.defs
@@ -0,0 +1,10 @@
+def java_sources(
+    name,
+    srcs,
+    visibility = []
+  ):
+  java_library(
+    name = name,
+    resources = srcs,
+    visibility = visibility,
+  )