Add mostly auto-generated api documentation

Change-Id: Ib007e4fbe69d3197a29f478a809fec4e3a541f4e
diff --git a/pom.xml b/pom.xml
index 037fa02..256bef1 100644
--- a/pom.xml
+++ b/pom.xml
@@ -258,6 +258,21 @@
                     </execution>
                 </executions>
             </plugin>
+            <plugin>
+                <groupId>org.apache.maven.plugins</groupId>
+                <artifactId>maven-javadoc-plugin</artifactId>
+                <version>3.5.0</version>
+                <configuration>
+                    <doclint>all,-missing</doclint>
+                    <tags>
+                        <tag>
+                            <name>apiNote</name>
+                            <placement>a</placement>
+                            <head>API Note:</head>
+                        </tag>
+                    </tags>
+                </configuration>
+            </plugin>
         </plugins>
     </build>