Many javadoc fixes thanks to Celtic Minstrel

By: Dinnerbone <dinnerbone@dinnerbone.com>

paper-api/src/main/java/org/bukkit/block/CreatureSpawner.java

@@ -13,42 +13,42 @@ public interface CreatureSpawner extends BlockState {
     /**
      * Get the spawner's creature type.
      *
-     * @return
+     * @return The creature type.
      */
     public CreatureType getCreatureType();
 
     /**
      * Set the spawner creature type.
      *
-     * @param mobType
+     * @param creatureType The creature type.
      */
     public void setCreatureType(CreatureType creatureType);
 
     /**
      * Get the spawner's creature type.
      *
-     * @return
+     * @return The creature type's name.
      */
     public String getCreatureTypeId();
 
     /**
      * Set the spawner mob type.
      *
-     * @param creatureType
+     * @param creatureType The creature type's name.
      */
     public void setCreatureTypeId(String creatureType);
 
     /**
      * Get the spawner's delay.
      *
-     * @return
+     * @return The delay.
      */
     public int getDelay();
 
     /**
      * Set the spawner's delay.
      *
-     * @param delay
+     * @param delay The delay.
      */
     public void setDelay(int delay);
 }