Javadoc improvements per checkstyle

By: md_5 <git@md-5.net>

paper-api/src/main/java/org/bukkit/map/MapCursor.java

@@ -261,6 +261,7 @@ public final class MapCursor {
         }
 
         /**
+         * Gets the internal value of the cursor.
          *
          * @return the value
          * @deprecated Magic value
@@ -271,6 +272,7 @@ public final class MapCursor {
         }
 
         /**
+         * Get a cursor by its internal value.
          *
          * @param value the value
          * @return the matching type

paper-api/src/main/java/org/bukkit/map/package-info.java

@@ -0,0 +1,6 @@
+/**
+ * Classes to facilitate plugin handling of {@link org.bukkit.Material#MAP
+ * map} displays.
+ */
+package org.bukkit.map;
+