Create repositories.bzl

This will help if we need to add dependencies or declare toolchains in
the future because users already have everything in their WORKSPACE

Author: Yannic

WORKSPACE

@@ -1 +1,5 @@
-# Empty WORKSPACE file.
+workspace(name = "rules_java")
+
+load("//java:repositories.bzl", "rules_java_dependencies", "rules_java_toolchains")
+rules_java_dependencies()
+rules_java_toolchains()

java/repositories.bzl

@@ -0,0 +1,21 @@
+# Copyright 2019 The Bazel Authors. All rights reserved.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#    http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+def rules_java_dependencies():
+    # Nothing to do here (yet).
+    pass
+
+def rules_java_toolchains():
+    # Nothing to do here (yet).
+    pass