Fix rule failure while trying to close staging repository

See #74

Author: junghoon-vans

pom.xml

@@ -169,12 +169,35 @@
         </profile>
 
         <!-- Profile for deploying to Sonatype OSSRH -->
-
         <profile>
             <id>central</id>
             <build>
                 <pluginManagement>
                     <plugins>
+                        <plugin>
+                            <groupId>org.apache.maven.plugins</groupId>
+                            <artifactId>maven-source-plugin</artifactId>
+                            <executions>
+                                <execution>
+                                    <id>attach-sources</id>
+                                    <goals>
+                                        <goal>jar-no-fork</goal>
+                                    </goals>
+                                </execution>
+                            </executions>
+                        </plugin>
+                        <plugin>
+                            <groupId>org.apache.maven.plugins</groupId>
+                            <artifactId>maven-javadoc-plugin</artifactId>
+                            <executions>
+                                <execution>
+                                    <id>attach-javadocs</id>
+                                    <goals>
+                                        <goal>jar</goal>
+                                    </goals>
+                                </execution>
+                            </executions>
+                        </plugin>
                         <plugin>
                             <groupId>org.sonatype.plugins</groupId>
                             <artifactId>nexus-staging-maven-plugin</artifactId>