Fix warnings and deprecations

src/main/java/com/jagrosh/jmusicbot/BotConfig.java

@@ -23,7 +23,6 @@
 import java.io.IOException;
 import java.nio.file.Files;
 import java.nio.file.Path;
-import java.util.Collections;
 import net.dv8tion.jda.api.OnlineStatus;
 import net.dv8tion.jda.api.entities.Activity;
 

src/main/java/com/jagrosh/jmusicbot/audio/AudioHandler.java

@@ -238,7 +238,7 @@ public Message getNowPlaying(JDA jda)
                     + " `[" + FormatUtil.formatTime(track.getPosition()) + "/" + FormatUtil.formatTime(track.getDuration()) + "]` "
                     + FormatUtil.volumeIcon(audioPlayer.getVolume()));
 
-            return mb.setEmbed(eb.build()).build();
+            return mb.setEmbeds(eb.build()).build();
         }
         else return null;
     }
@@ -248,7 +248,7 @@ public Message getNoMusicPlaying(JDA jda)
         Guild guild = guild(jda);
         return new MessageBuilder()
                 .setContent(FormatUtil.filter(manager.getBot().getConfig().getSuccess()+" **Now Playing...**"))
-                .setEmbed(new EmbedBuilder()
+                .setEmbeds(new EmbedBuilder()
                 .setTitle("No music playing")
                 .setDescription(JMusicBot.STOP_EMOJI+" "+FormatUtil.progressBar(-1)+" "+FormatUtil.volumeIcon(audioPlayer.getVolume()))
                 .setColor(guild.getSelfMember().getColor())

src/main/java/com/jagrosh/jmusicbot/audio/PlayerManager.java

@@ -20,7 +20,6 @@
 import com.sedmelluq.discord.lavaplayer.player.DefaultAudioPlayerManager;
 import com.sedmelluq.discord.lavaplayer.source.AudioSourceManagers;
 import com.sedmelluq.discord.lavaplayer.source.youtube.YoutubeAudioSourceManager;
-import com.typesafe.config.Config;
 import net.dv8tion.jda.api.entities.Guild;
 
 /**

src/main/java/com/jagrosh/jmusicbot/commands/dj/ForceskipCmd.java

@@ -20,7 +20,6 @@
 import com.jagrosh.jmusicbot.audio.AudioHandler;
 import com.jagrosh.jmusicbot.audio.RequestMetadata;
 import com.jagrosh.jmusicbot.commands.DJCommand;
-import net.dv8tion.jda.api.entities.User;
 
 /**
  *

src/main/java/com/jagrosh/jmusicbot/commands/general/SettingsCmd.java

@@ -68,7 +68,7 @@ protected void execute(CommandEvent event)
                 .setFooter(event.getJDA().getGuilds().size() + " servers | "
                         + event.getJDA().getGuilds().stream().filter(g -> g.getSelfMember().getVoiceState().inVoiceChannel()).count()
                         + " audio connections", null);
-        event.getChannel().sendMessage(builder.setEmbed(ebuilder.build()).build()).queue();
+        event.getChannel().sendMessage(builder.setEmbeds(ebuilder.build()).build()).queue();
     }
 
 }

src/main/java/com/jagrosh/jmusicbot/commands/music/QueueCmd.java

@@ -78,7 +78,7 @@ public void doCommand(CommandEvent event)
             Message nonowp = ah.getNoMusicPlaying(event.getJDA());
             Message built = new MessageBuilder()
                     .setContent(event.getClient().getWarning() + " There is no music in the queue!")
-                    .setEmbed((nowp==null ? nonowp : nowp).getEmbeds().get(0)).build();
+                    .setEmbeds((nowp==null ? nonowp : nowp).getEmbeds().get(0)).build();
             event.reply(built, m -> 
             {
                 if(nowp!=null)

src/main/java/com/jagrosh/jmusicbot/commands/music/SkipCmd.java

@@ -20,7 +20,6 @@
 import com.jagrosh.jmusicbot.audio.AudioHandler;
 import com.jagrosh.jmusicbot.audio.RequestMetadata;
 import com.jagrosh.jmusicbot.commands.MusicCommand;
-import net.dv8tion.jda.api.entities.User;
 
 /**
  *

src/main/java/com/jagrosh/jmusicbot/playlist/PlaylistLoader.java

@@ -53,7 +53,7 @@ public List<String> getPlaylistNames()
         else
         {
             createFolder();
-            return Collections.EMPTY_LIST;
+            return Collections.emptyList();
         }
     }
 

src/main/java/com/jagrosh/jmusicbot/settings/Settings.java

@@ -130,7 +130,7 @@ public double getSkipRatio()
     @Override
     public Collection<String> getPrefixes()
     {
-        return prefix == null ? Collections.EMPTY_SET : Collections.singleton(prefix);
+        return prefix == null ? Collections.emptySet() : Collections.singleton(prefix);
     }
 
     // Setters

src/main/java/com/jagrosh/jmusicbot/settings/SettingsManager.java

@@ -29,7 +29,7 @@
  *
  * @author John Grosh ([email protected])
  */
-public class SettingsManager implements GuildSettingsManager
+public class SettingsManager implements GuildSettingsManager<Settings>
 {
     private final static double SKIP_RATIO = .55;
     private final HashMap<Long,Settings> settings;