create maven module 'core' (#19)

* create maven module 'core'

* update release plugins

core/pom.xml

@@ -0,0 +1,40 @@
+<?xml version="1.0"?>
+<!--
+ Copyright (c) Microsoft Corporation. All rights reserved.
+ Licensed under the MIT License. See LICENSE in the project root for
+ license information.
+-->
+<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>
+
+  <parent>
+    <groupId>com.microsoft.jfr</groupId>
+    <artifactId>microsoft-jfr</artifactId>
+    <version>1.2.1-SNAPSHOT</version>
+    <relativePath>../pom.xml</relativePath>
+  </parent>
+
+  <artifactId>jfr-streaming</artifactId>
+  <name>JFR Streaming Core</name>
+  <description>Core implemenation of a portable API for accessing JFR.</description>
+  <url>${project.parent.url}</url>
+
+  <dependencies>
+    <dependency>
+      <groupId>org.testng</groupId>
+      <artifactId>testng</artifactId>
+      <scope>test</scope>
+    </dependency>
+    <dependency>
+      <groupId>org.mockito</groupId>
+      <artifactId>mockito-testng</artifactId>
+      <scope>test</scope>
+    </dependency>
+    <dependency>
+      <groupId>org.openjdk.jmc</groupId>
+      <artifactId>flightrecorder</artifactId>
+      <scope>test</scope>
+    </dependency>
+  </dependencies>
+
+</project>

pom.xml

@@ -7,7 +7,8 @@
 <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/maven-v4_0_0.xsd">
   <modelVersion>4.0.0</modelVersion>
   <groupId>com.microsoft.jfr</groupId>
-  <artifactId>jfr-streaming</artifactId>
+  <artifactId>microsoft-jfr</artifactId>
+  <packaging>pom</packaging>
   <version>1.2.1-SNAPSHOT</version>
 
   <name>Java Flight Recorder Streaming Library</name>
@@ -78,6 +79,10 @@
       </build>
     </profile>
   </profiles>
+
+  <modules>
+    <module>core</module>
+  </modules>
   
   <properties>
     <maven.compiler.source>8</maven.compiler.source>
@@ -87,7 +92,8 @@
     <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
   </properties>
 
-  <dependencies>
+  <dependencyManagement>
+   <dependencies>
     <dependency>
       <groupId>org.testng</groupId>
       <artifactId>testng</artifactId>
@@ -106,7 +112,8 @@
       <version>8.2.0</version>
       <scope>test</scope>
     </dependency>
-  </dependencies>
+   </dependencies>
+  </dependencyManagement>
 
   <build>
     <plugins>
@@ -172,7 +179,7 @@
       <plugin>
         <groupId>org.apache.maven.plugins</groupId>
         <artifactId>maven-gpg-plugin</artifactId>
-        <version>1.6</version>
+        <version>3.0.1</version>
         <executions>
           <execution>
             <id>sign-artifacts</id>
@@ -186,7 +193,7 @@
       <plugin>
         <groupId>org.sonatype.plugins</groupId>
         <artifactId>nexus-staging-maven-plugin</artifactId>
-        <version>1.6.8</version>
+        <version>1.6.13</version>
         <extensions>true</extensions>
         <configuration>
           <serverId>ossrh</serverId>