Add a tag for formatting

src/main/java/com/maxmind/db/CacheKey.java

@@ -1,7 +1,7 @@
 package com.maxmind.db;
 
 /**
- * CacheKey is used as a key in the node cache. It contains the offset of the
+ * {@code CacheKey} is used as a key in the node cache. It contains the offset of the
  * node in the database file, the class of the data at that node, and the type
  * of the data at that node.
  *

src/main/java/com/maxmind/db/MaxMindDbConstructor.java

@@ -4,7 +4,7 @@
 import java.lang.annotation.RetentionPolicy;
 
 /**
- * MaxMindDbConstructor is an annotation that can be used to mark a constructor
+ * {@code MaxMindDbConstructor} is an annotation that can be used to mark a constructor
  * that should be used to create an instance of a class when decoding a MaxMind
  * DB file.
  */

src/main/java/com/maxmind/db/Metadata.java

@@ -6,7 +6,7 @@
 import java.util.Map;
 
 /**
- * Metadata holds data associated with the database itself.
+ * {@code Metadata} holds data associated with the database itself.
  */
 public final class Metadata {
     private final int binaryFormatMajorVersion;
@@ -31,7 +31,7 @@ public final class Metadata {
     private final int searchTreeSize;
 
     /**
-     * Constructs a Metadata object.
+     * Constructs a {@code Metadata} object.
      *
      * @param binaryFormatMajorVersion The major version number for the database's
      *                                 binary format.