add a bom

Author: JoeWang1127

java-sdk-logging/java-sdk-logging-bom/pom.xml

@@ -0,0 +1,29 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<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/xsd/maven-4.0.0.xsd">
+  <modelVersion>4.0.0</modelVersion>
+  <parent>
+    <groupId>com.google.api</groupId>
+    <artifactId>java-sdk-logging-parent</artifactId>
+    <version>0.1.0-SNAPSHOT</version>
+    <relativePath>../pom.xml</relativePath>
+  </parent>
+  <packaging>pom</packaging>
+
+  <artifactId>java-sdk-logging-bom</artifactId>
+
+  <properties>
+    <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
+  </properties>
+
+  <dependencyManagement>
+    <dependencies>
+      <dependency>
+        <groupId>com.google.api</groupId>
+        <artifactId>logback-extension</artifactId>
+        <version>0.1.0-SNAPSHOT</version>
+      </dependency>
+    </dependencies>
+  </dependencyManagement>
+</project>

java-sdk-logging/logback-extension/pom.xml

@@ -5,10 +5,12 @@
   <modelVersion>4.0.0</modelVersion>
   <parent>
     <groupId>com.google.api</groupId>
-    <artifactId>java-sdk-logging</artifactId>
-    <version>0.0.1-SNAPSHOT</version>
+    <artifactId>java-sdk-logging-parent</artifactId>
+    <version>0.1.0-SNAPSHOT</version>
+    <relativePath>../pom.xml</relativePath>
   </parent>
   <artifactId>logback-extension</artifactId>
+  <version>0.1.0-SNAPSHOT</version>
 
   <properties>
     <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>

java-sdk-logging/pom.xml

@@ -3,8 +3,8 @@
     xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
     xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
   <modelVersion>4.0.0</modelVersion>
-  <artifactId>java-sdk-logging</artifactId>
-  <version>0.0.1-SNAPSHOT</version>
+  <artifactId>java-sdk-logging-parent</artifactId>
+  <version>0.1.0-SNAPSHOT</version>
   <packaging>pom</packaging>
   <parent>
     <groupId>com.google.api</groupId>
@@ -14,6 +14,7 @@
   </parent>
   <modules>
     <module>logback-extension</module>
+    <module>java-sdk-logging-bom</module>
   </modules>
 
   <properties>