Javadoc improvements per checkstyle

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

paper-api/src/main/java/org/bukkit/entity/EntityType.java

@@ -325,6 +325,7 @@ public enum EntityType implements Keyed {
     }
 
     /**
+     * Gets the entity type name.
      *
      * @return the entity type's name
      * @deprecated Magic value
@@ -349,6 +350,7 @@ public enum EntityType implements Keyed {
     }
 
     /**
+     * Gets the entity type id.
      *
      * @return the raw type id
      * @deprecated Magic value
@@ -359,6 +361,7 @@ public enum EntityType implements Keyed {
     }
 
     /**
+     * Gets an entity type from its name.
      *
      * @param name the entity type's name
      * @return the matching entity type or null
@@ -375,6 +378,7 @@ public enum EntityType implements Keyed {
     }
 
     /**
+     * Gets an entity from its id.
      *
      * @param id the raw type id
      * @return the matching entity type or null

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

@@ -0,0 +1,6 @@
+/**
+ * Classes concerning an entity's persistent memory.
+ *
+ * Currently only relevant for Villagers.
+ */
+package org.bukkit.entity.memory;

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

@@ -0,0 +1,5 @@
+/**
+ * Interfaces for various {@link org.bukkit.entity.Minecart} types.
+ */
+package org.bukkit.entity.minecart;
+

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

@@ -0,0 +1,6 @@
+/**
+ * Interfaces for non-voxel objects that can exist in a {@link
+ * org.bukkit.World world}, including all players, monsters, projectiles, etc.
+ */
+package org.bukkit.entity;
+