Fix some statically detected code issues

This includes: unnecessary semicolons, suppress warnings, switch statements, final/private qualifiers, Optional wrapping, conditionals, both inline and non-inline variables, ternaries, Collection putAll() calls, StringBuilders, and throws declarations.

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Created by MOE: https://github.com/google/moe
MOE_MIGRATED_REVID=244182539

java/google/registry/model/domain/DesignatedContact.java

@@ -53,7 +53,7 @@ public class DesignatedContact extends ImmutableObject {
     @XmlEnumValue("tech")
     TECH,
     /** The registrant type is not reflected in XML and exists only for internal use. */
-    REGISTRANT;
+    REGISTRANT
   }
 
   public static DesignatedContact create(Type type, Key<ContactResource> contact) {