Minor cleanup

src/main/java/org/bukkit/configuration/file/YamlConfiguration.java

@@ -4,7 +4,6 @@ import java.io.File;
 import java.io.FileNotFoundException;
 import java.io.IOException;
 import java.io.InputStream;
-import java.util.LinkedHashMap;
 import java.util.Map;
 import java.util.logging.Level;
 
@@ -29,8 +28,6 @@ public class YamlConfiguration extends FileConfiguration {
 
     @Override
     public String saveToString() {
-        Map<String, Object> output = new LinkedHashMap<String, Object>();
-
         yamlOptions.setIndent(options().indent());
         yamlOptions.setDefaultFlowStyle(DumperOptions.FlowStyle.BLOCK);
         yamlRepresenter.setDefaultFlowStyle(DumperOptions.FlowStyle.BLOCK);
@@ -45,6 +42,7 @@ public class YamlConfiguration extends FileConfiguration {
         return header + dump;
     }
 
+    @SuppressWarnings("unchecked")
     @Override
     public void loadFromString(String contents) throws InvalidConfigurationException {
         if (contents == null) {
@@ -70,6 +68,7 @@ public class YamlConfiguration extends FileConfiguration {
         }
     }
 
+    @SuppressWarnings("unchecked")
     protected void convertMapsToSections(Map<Object, Object> input, ConfigurationSection section) {
         for (Map.Entry<Object, Object> entry : input.entrySet()) {
             String key = entry.getKey().toString();

src/main/java/org/bukkit/configuration/file/YamlConstructor.java

@@ -23,6 +23,7 @@ public class YamlConstructor extends SafeConstructor {
                 throw new YAMLException("Unexpected referential mapping structure. Node: " + node);
             }
 
+            @SuppressWarnings("unchecked")
             Map<Object, Object> raw = (Map<Object, Object>) super.construct(node);
 
             if (raw.containsKey(ConfigurationSerialization.SERIALIZED_TYPE_KEY)) {

src/main/java/org/bukkit/configuration/file/YamlRepresenter.java

@@ -19,7 +19,6 @@ public class YamlRepresenter extends Representer {
 
     private class RepresentConfigurationSection extends RepresentMap {
         @Override
-        @SuppressWarnings("unchecked")
         public Node representData(Object data) {
             return super.representData(((ConfigurationSection) data).getValues(false));
         }
@@ -27,7 +26,6 @@ public class YamlRepresenter extends Representer {
 
     private class RepresentConfigurationSerializable extends RepresentMap {
         @Override
-        @SuppressWarnings("unchecked")
         public Node representData(Object data) {
             ConfigurationSerializable serializable = (ConfigurationSerializable) data;
             Map<String, Object> values = new LinkedHashMap<String, Object>();

src/main/java/org/bukkit/event/block/EntityBlockFormEvent.java

@@ -12,6 +12,7 @@ import org.bukkit.entity.Entity;
  * <li>Snow formed by a {@link org.bukkit.entity.Snowman}.</li>
  * </ul>
  */
+@SuppressWarnings("serial")
 public class EntityBlockFormEvent extends BlockFormEvent {
     private Entity entity;
 

src/main/java/org/bukkit/event/entity/EntityCreatePortalEvent.java

@@ -10,6 +10,7 @@ import org.bukkit.event.HandlerList;
 /**
  * Thrown when a Living Entity creates a portal in a world.
  */
+@SuppressWarnings("serial")
 public class EntityCreatePortalEvent extends EntityEvent implements Cancellable {
     private static final HandlerList handlers = new HandlerList();
     private List<BlockState> blocks;

src/main/java/org/bukkit/event/entity/ItemDespawnEvent.java

@@ -5,6 +5,7 @@ import org.bukkit.entity.Entity;
 import org.bukkit.event.Cancellable;
 import org.bukkit.event.HandlerList;
 
+@SuppressWarnings("serial")
 public class ItemDespawnEvent extends EntityEvent implements Cancellable {
     private static final HandlerList handlers = new HandlerList();
     private boolean canceled;

src/main/java/org/bukkit/plugin/messaging/ChannelNameTooLongException.java

@@ -3,6 +3,7 @@ package org.bukkit.plugin.messaging;
 /**
  * Thrown if a Plugin Channel is too long.
  */
+@SuppressWarnings("serial")
 public class ChannelNameTooLongException extends RuntimeException {
     public ChannelNameTooLongException() {
         super("Attempted to send a Plugin Message to a channel that was too large. The maximum length a channel may be is " + Messenger.MAX_CHANNEL_SIZE + " chars.");

src/main/java/org/bukkit/plugin/messaging/ChannelNotRegisteredException.java

@@ -3,6 +3,7 @@ package org.bukkit.plugin.messaging;
 /**
  * Thrown if a Plugin attempts to send a message on an unregistered channel.
  */
+@SuppressWarnings("serial")
 public class ChannelNotRegisteredException extends RuntimeException {
     public ChannelNotRegisteredException() {
         this("Attempted to send a plugin message through an unregistered channel.");

src/main/java/org/bukkit/plugin/messaging/MessageTooLargeException.java

@@ -3,6 +3,7 @@ package org.bukkit.plugin.messaging;
 /**
  * Thrown if a Plugin Message is sent that is too large to be sent.
  */
+@SuppressWarnings("serial")
 public class MessageTooLargeException extends RuntimeException {
     public MessageTooLargeException() {
         this("Attempted to send a plugin message that was too large. The maximum length a plugin message may be is " + Messenger.MAX_MESSAGE_SIZE + " bytes.");

src/main/java/org/bukkit/plugin/messaging/ReservedChannelException.java

@@ -3,6 +3,7 @@ package org.bukkit.plugin.messaging;
 /**
  * Thrown if a plugin attempts to register for a reserved channel (such as "REGISTER")
  */
+@SuppressWarnings("serial")
 public class ReservedChannelException extends RuntimeException {
     public ReservedChannelException() {
         this("Attempted to register for a reserved channel name.");