[ASTERIXDB-2979][MTD][GRAPH] Implement CREATE / DROP GRAPH

Initial commit. This supports CREATE GRAPH, DROP GRAPH, and prevents
dropping views / functions / datasets / synonyms / dataverses that a
graph depends on.

Change-Id: Ibaf4dc7066b85d8ea3b58c6b90fd83af3a700506
Reviewed-on: https://asterix-gerrit.ics.uci.edu/c/asterixdb-graph/+/14644
Tested-by: Jenkins <jenkins@fulliautomatix.ics.uci.edu>
Reviewed-by: Ian Maxon <imaxon@uci.edu>
diff --git a/pom.xml b/pom.xml
new file mode 100644
index 0000000..c5b0b51
--- /dev/null
+++ b/pom.xml
@@ -0,0 +1,37 @@
+<!--
+ ! Licensed to the Apache Software Foundation (ASF) under one
+ ! or more contributor license agreements. See the NOTICE file
+ ! distributed with this work for additional information
+ ! regarding copyright ownership. The ASF licenses this file
+ ! to you 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.
+ !-->
+<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/maven-v4_0_0.xsd">
+  <modelVersion>4.0.0</modelVersion>
+  <groupId>org.apache.asterix.graphix</groupId>
+  <artifactId>asterix-opt</artifactId>
+  <version>0.1.0-SNAPSHOT</version>
+  <packaging>pom</packaging>
+
+  <parent>
+    <groupId>org.apache.asterix</groupId>
+    <artifactId>apache-asterixdb</artifactId>
+    <version>0.9.7-SNAPSHOT</version>
+  </parent>
+
+  <modules>
+    <module>asterix-graphix</module>
+    <module>asterix-opt-bom</module>
+  </modules>
+</project>