Depends on javadoc and gpg plugins

pom.xml

@@ -99,6 +99,8 @@
         <maven-source-plugin.version>3.0.1</maven-source-plugin.version>
         <coveralls-maven-plugin.version>4.3.0</coveralls-maven-plugin.version>
         <maven-checkstyle-plugin.version>3.2.1</maven-checkstyle-plugin.version>
+        <maven-javadoc-plugin.version>3.0.1</maven-javadoc-plugin.version>
+        <maven-gpg-plugin.version>1.6</maven-gpg-plugin.version>
 
         <!-- Plugin configuration -->
         <checkstyle.fails.on.error>true</checkstyle.fails.on.error>
@@ -109,7 +111,7 @@
 
     <profiles>
         <profile>
-            <id>all</id>
+            <id>release</id>
             <activation>
                 <activeByDefault>false</activeByDefault>
             </activation>
@@ -139,6 +141,40 @@
                             </execution>
                         </executions>
                     </plugin>
+
+                    <plugin>
+                        <groupId>org.apache.maven.plugins</groupId>
+                        <artifactId>maven-javadoc-plugin</artifactId>
+                        <version>${maven-javadoc-plugin.version}</version>
+                        <configuration>
+                            <quiet>true</quiet>
+                            <failOnError>false</failOnError>
+                            <doclint>all,-missing</doclint>
+                        </configuration>
+                        <executions>
+                            <execution>
+                                <id>attach-javadocs</id>
+                                <goals>
+                                    <goal>jar</goal>
+                                </goals>
+                            </execution>
+                        </executions>
+                    </plugin>
+
+                    <plugin>
+                        <groupId>org.apache.maven.plugins</groupId>
+                        <artifactId>maven-gpg-plugin</artifactId>
+                        <version>${maven-gpg-plugin.version}</version>
+                        <executions>
+                            <execution>
+                                <id>sign-artifacts</id>
+                                <phase>verify</phase>
+                                <goals>
+                                    <goal>sign</goal>
+                                </goals>
+                            </execution>
+                        </executions>
+                    </plugin>
                 </plugins>
             </build>
         </profile>