Fixed even more Checkstyle issues, this time in the proxy components.

proxy/src/main/java/com/velocitypowered/proxy/connection/backend/BackendPlaySessionHandler.java

@@ -94,7 +94,7 @@ public class BackendPlaySessionHandler implements MinecraftSessionHandler {
     }
 
     if (PluginMessageUtil.isMCBrand(packet)) {
-      serverConn.getPlayer().getConnection().write(PluginMessageUtil.rewriteMCBrand(packet));
+      serverConn.getPlayer().getConnection().write(PluginMessageUtil.rewriteMinecraftBrand(packet));
       return true;
     }
 

proxy/src/main/java/com/velocitypowered/proxy/connection/backend/VelocityServerConnection.java

@@ -103,11 +103,11 @@ public class VelocityServerConnection implements MinecraftConnectionAssociation,
   private String createBungeeForwardingAddress() {
     // BungeeCord IP forwarding is simply a special injection after the "address" in the handshake,
     // separated by \0 (the null byte). In order, you send the original host, the player's IP, their
-    // UUID (undashed), and if you are in online-mode, their login properties (retrieved from Mojang).
-    return registeredServer.getServerInfo().getAddress().getHostString() + "\0" +
-        proxyPlayer.getRemoteAddress().getHostString() + "\0" +
-        proxyPlayer.getProfile().getId() + "\0" +
-        GSON.toJson(proxyPlayer.getProfile().getProperties());
+    // UUID (undashed), and if you are in online-mode, their login properties (from Mojang).
+    return registeredServer.getServerInfo().getAddress().getHostString() + "\0"
+        + proxyPlayer.getRemoteAddress().getHostString() + "\0"
+        + proxyPlayer.getProfile().getId() + "\0"
+        + GSON.toJson(proxyPlayer.getProfile().getProperties());
   }
 
   private void startHandshake() {

proxy/src/main/java/com/velocitypowered/proxy/connection/client/ClientPlaySessionHandler.java

@@ -182,7 +182,7 @@ public class ClientPlaySessionHandler implements MinecraftSessionHandler {
         clientPluginMsgChannels.removeAll(channels);
         backendConn.write(packet);
       } else if (PluginMessageUtil.isMCBrand(packet)) {
-        backendConn.write(PluginMessageUtil.rewriteMCBrand(packet));
+        backendConn.write(PluginMessageUtil.rewriteMinecraftBrand(packet));
       } else if (backendConn.isLegacyForge() && !serverConn.hasCompletedJoin()) {
         if (packet.getChannel().equals(ForgeConstants.FORGE_LEGACY_HANDSHAKE_CHANNEL)) {
           if (!player.getModInfo().isPresent()) {
@@ -195,9 +195,10 @@ public class ClientPlaySessionHandler implements MinecraftSessionHandler {
           // Always forward the FML handshake to the remote server.
           backendConn.write(packet);
         } else {
-          // The client is trying to send messages too early. This is primarily caused by mods, but it's further
-          // aggravated by Velocity. To work around these issues, we will queue any non-FML handshake messages to
-          // be sent once the JoinGame packet has been received by the proxy.
+          // The client is trying to send messages too early. This is primarily caused by mods, but
+          // it's further aggravated by Velocity. To work around these issues, we will queue any
+          // non-FML handshake messages to be sent once the JoinGame packet has been received by the
+          // proxy.
           loginPluginMessages.add(packet);
         }
       } else {
@@ -287,12 +288,12 @@ public class ClientPlaySessionHandler implements MinecraftSessionHandler {
       spawned = true;
       player.getConnection().delayedWrite(joinGame);
 
-      // We have something special to do for legacy Forge servers - during first connection the FML handshake
-      // will transition to complete regardless. Thus, we need to ensure that a reset packet is ALWAYS sent on
-      // first switch.
+      // We have something special to do for legacy Forge servers - during first connection the FML
+      // handshake will transition to complete regardless. Thus, we need to ensure that a reset
+      // packet is ALWAYS sent on first switch.
       //
-      // As we know that calling this branch only happens on first join, we set that if we are a Forge
-      // client that we must reset on the next switch.
+      // As we know that calling this branch only happens on first join, we set that if we are a
+      // Forge client that we must reset on the next switch.
       //
       // The call will handle if the player is not a Forge player appropriately.
       player.getConnection().setCanSendLegacyFMLResetPacket(true);
@@ -306,11 +307,12 @@ public class ClientPlaySessionHandler implements MinecraftSessionHandler {
       // - A respawn packet with a different dimension
       // - Another respawn with the correct dimension
       //
-      // The two respawns with different dimensions are required, otherwise the client gets confused.
+      // The two respawns with different dimensions are required, otherwise the client gets
+      // confused.
       //
-      // Most notably, by having the client accept the join game packet, we can work around the need to perform
-      // entity ID rewrites, eliminating potential issues from rewriting packets and improving compatibility with
-      // mods.
+      // Most notably, by having the client accept the join game packet, we can work around the need
+      // to perform entity ID rewrites, eliminating potential issues from rewriting packets and
+      // improving compatibility with mods.
       player.getConnection().delayedWrite(joinGame);
       int tempDim = joinGame.getDimension() == 0 ? -1 : 0;
       player.getConnection().delayedWrite(
@@ -360,12 +362,12 @@ public class ClientPlaySessionHandler implements MinecraftSessionHandler {
       // We only need to indicate we can send a reset packet if we complete a handshake, that is,
       // logged onto a Forge server.
       //
-      // The special case is if we log onto a Vanilla server as our first server, FML will treat this
-      // as complete and **will** need a reset packet sending at some point. We will handle this
-      // during initial player connection if the player is detected to be forge.
+      // The special case is if we log onto a Vanilla server as our first server, FML will treat
+      // this  as complete and **will** need a reset packet sending at some point. We will handle
+      // this during initial player connection if the player is detected to be forge.
       //
-      // This is why we use an if statement rather than the result of VelocityServerConnection#isLegacyForge()
-      // because we don't want to set it false if this is a first connection to a Vanilla server.
+      // We do not use the result of VelocityServerConnection#isLegacyForge() directly because we
+      // don't want to set it false if this is a first connection to a Vanilla server.
       //
       // See LoginSessionHandler#handle for where the counterpart to this method is
       player.getConnection().setCanSendLegacyFMLResetPacket(true);

proxy/src/main/java/com/velocitypowered/proxy/protocol/netty/GS4QueryHandler.java

@@ -22,6 +22,7 @@ import java.util.Collection;
 import java.util.Collections;
 import java.util.Iterator;
 import java.util.List;
+import java.util.Optional;
 import java.util.Set;
 import java.util.concurrent.ThreadLocalRandom;
 import java.util.concurrent.TimeUnit;
@@ -174,8 +175,8 @@ public class GS4QueryHandler extends SimpleChannelInboundHandler<DatagramPacket>
       }
     } catch (Exception e) {
       logger.warn("Error while trying to handle a query packet from {}", msg.sender(), e);
-      // NB: Only need to explicitly release upon exception, writing the response out will decrement the reference
-      // count.
+      // NB: Only need to explicitly release upon exception, writing the response out will decrement
+      // the reference count.
       responsePacket.release();
     }
   }
@@ -265,9 +266,8 @@ public class GS4QueryHandler extends SimpleChannelInboundHandler<DatagramPacket>
       while (iterator.hasNext()) {
         QueryResponse.PluginInformation info = iterator.next();
         pluginsString.append(info.getName());
-        if (info.getVersion() != null) {
-          pluginsString.append(' ').append(info.getVersion());
-        }
+        Optional<String> version = info.getVersion();
+        version.ifPresent(s -> pluginsString.append(' ').append(s));
         if (iterator.hasNext()) {
           pluginsString.append(';').append(' ');
         }

proxy/src/main/java/com/velocitypowered/proxy/protocol/packet/BossBar.java

@@ -85,15 +85,15 @@ public class BossBar implements MinecraftPacket {
 
   @Override
   public String toString() {
-    return "BossBar{" +
-        "uuid=" + uuid +
-        ", action=" + action +
-        ", name='" + name + '\'' +
-        ", percent=" + percent +
-        ", color=" + color +
-        ", overlay=" + overlay +
-        ", flags=" + flags +
-        '}';
+    return "BossBar{"
+        + "uuid=" + uuid
+        + ", action=" + action
+        + ", name='" + name + '\''
+        + ", percent=" + percent
+        + ", color=" + color
+        + ", overlay=" + overlay
+        + ", flags=" + flags
+        + '}';
   }
 
   @Override

proxy/src/main/java/com/velocitypowered/proxy/protocol/packet/Chat.java

@@ -47,10 +47,10 @@ public class Chat implements MinecraftPacket {
 
   @Override
   public String toString() {
-    return "Chat{" +
-        "message='" + message + '\'' +
-        ", type=" + type +
-        '}';
+    return "Chat{"
+        + "message='" + message + '\''
+        + ", type=" + type
+        + '}';
   }
 
   @Override

proxy/src/main/java/com/velocitypowered/proxy/protocol/packet/Disconnect.java

@@ -34,9 +34,9 @@ public class Disconnect implements MinecraftPacket {
 
   @Override
   public String toString() {
-    return "Disconnect{" +
-        "reason='" + reason + '\'' +
-        '}';
+    return "Disconnect{"
+        + "reason='" + reason + '\''
+        + '}';
   }
 
   @Override

proxy/src/main/java/com/velocitypowered/proxy/protocol/packet/EncryptionRequest.java

@@ -33,10 +33,10 @@ public class EncryptionRequest implements MinecraftPacket {
 
   @Override
   public String toString() {
-    return "EncryptionRequest{" +
-        "publicKey=" + Arrays.toString(publicKey) +
-        ", verifyToken=" + Arrays.toString(verifyToken) +
-        '}';
+    return "EncryptionRequest{"
+        + "publicKey=" + Arrays.toString(publicKey)
+        + ", verifyToken=" + Arrays.toString(verifyToken)
+        + '}';
   }
 
   @Override

proxy/src/main/java/com/velocitypowered/proxy/protocol/packet/EncryptionResponse.java

@@ -32,10 +32,10 @@ public class EncryptionResponse implements MinecraftPacket {
 
   @Override
   public String toString() {
-    return "EncryptionResponse{" +
-        "sharedSecret=" + Arrays.toString(sharedSecret) +
-        ", verifyToken=" + Arrays.toString(verifyToken) +
-        '}';
+    return "EncryptionResponse{"
+        + "sharedSecret=" + Arrays.toString(sharedSecret)
+        + ", verifyToken=" + Arrays.toString(verifyToken)
+        + '}';
   }
 
   @Override

proxy/src/main/java/com/velocitypowered/proxy/protocol/packet/Handshake.java

@@ -47,12 +47,12 @@ public class Handshake implements MinecraftPacket {
 
   @Override
   public String toString() {
-    return "Handshake{" +
-        "protocolVersion=" + protocolVersion +
-        ", serverAddress='" + serverAddress + '\'' +
-        ", port=" + port +
-        ", nextStatus=" + nextStatus +
-        '}';
+    return "Handshake{"
+        + "protocolVersion=" + protocolVersion
+        + ", serverAddress='" + serverAddress + '\''
+        + ", port=" + port
+        + ", nextStatus=" + nextStatus
+        + '}';
   }
 
   @Override

proxy/src/main/java/com/velocitypowered/proxy/protocol/packet/JoinGame.java

@@ -78,15 +78,15 @@ public class JoinGame implements MinecraftPacket {
 
   @Override
   public String toString() {
-    return "JoinGame{" +
-        "entityId=" + entityId +
-        ", gamemode=" + gamemode +
-        ", dimension=" + dimension +
-        ", difficulty=" + difficulty +
-        ", maxPlayers=" + maxPlayers +
-        ", levelType='" + levelType + '\'' +
-        ", reducedDebugInfo=" + reducedDebugInfo +
-        '}';
+    return "JoinGame{"
+        + "entityId=" + entityId
+        + ", gamemode=" + gamemode
+        + ", dimension=" + dimension
+        + ", difficulty=" + difficulty
+        + ", maxPlayers=" + maxPlayers
+        + ", levelType='" + levelType + '\''
+        + ", reducedDebugInfo=" + reducedDebugInfo
+        + '}';
   }
 
   @Override

proxy/src/main/java/com/velocitypowered/proxy/protocol/packet/KeepAlive.java

@@ -22,9 +22,9 @@ public class KeepAlive implements MinecraftPacket {
 
   @Override
   public String toString() {
-    return "KeepAlive{" +
-        "randomId=" + randomId +
-        '}';
+    return "KeepAlive{"
+        + "randomId=" + randomId
+        + '}';
   }
 
   @Override

proxy/src/main/java/com/velocitypowered/proxy/protocol/packet/LegacyDisconnect.java

@@ -7,10 +7,15 @@ public class LegacyDisconnect {
 
   private final String reason;
 
-  public LegacyDisconnect(String reason) {
+  private LegacyDisconnect(String reason) {
     this.reason = reason;
   }
 
+  /**
+   * Converts a legacy response into a disconnect packet.
+   * @param response the response to convert
+   * @return the disconnect packet
+   */
   public static LegacyDisconnect fromPingResponse(LegacyPingResponse response) {
     String kickMessage = String.join("\0",
         "§1",

proxy/src/main/java/com/velocitypowered/proxy/protocol/packet/LegacyPingResponse.java

@@ -45,15 +45,20 @@ public class LegacyPingResponse {
 
   @Override
   public String toString() {
-    return "LegacyPingResponse{" +
-        "protocolVersion=" + protocolVersion +
-        ", serverVersion='" + serverVersion + '\'' +
-        ", motd='" + motd + '\'' +
-        ", playersOnline=" + playersOnline +
-        ", playersMax=" + playersMax +
-        '}';
+    return "LegacyPingResponse{"
+        + "protocolVersion=" + protocolVersion
+        + ", serverVersion='" + serverVersion + '\''
+        + ", motd='" + motd + '\''
+        + ", playersOnline=" + playersOnline
+        + ", playersMax=" + playersMax
+        + '}';
   }
 
+  /**
+   * Transforms a {@link ServerPing} into a legacy ping response.
+   * @param ping the response to transform
+   * @return the legacy ping response
+   */
   public static LegacyPingResponse from(ServerPing ping) {
     return new LegacyPingResponse(ping.getVersion().getProtocol(),
         ping.getVersion().getName(),

proxy/src/main/java/com/velocitypowered/proxy/protocol/packet/LoginPluginMessage.java

@@ -41,11 +41,11 @@ public class LoginPluginMessage implements MinecraftPacket {
 
   @Override
   public String toString() {
-    return "LoginPluginMessage{" +
-        "id=" + id +
-        ", channel='" + channel + '\'' +
-        ", data=" + data +
-        '}';
+    return "LoginPluginMessage{"
+        + "id=" + id
+        + ", channel='" + channel + '\''
+        + ", data=" + data
+        + '}';
   }
 
   @Override

proxy/src/main/java/com/velocitypowered/proxy/protocol/packet/LoginPluginResponse.java

@@ -39,11 +39,11 @@ public class LoginPluginResponse implements MinecraftPacket {
 
   @Override
   public String toString() {
-    return "LoginPluginResponse{" +
-        "id=" + id +
-        ", success=" + success +
-        ", data=" + data +
-        '}';
+    return "LoginPluginResponse{"
+        + "id=" + id
+        + ", success=" + success
+        + ", data=" + data
+        + '}';
   }
 
   @Override

proxy/src/main/java/com/velocitypowered/proxy/protocol/packet/PluginMessage.java

@@ -36,10 +36,10 @@ public class PluginMessage implements MinecraftPacket {
 
   @Override
   public String toString() {
-    return "PluginMessage{" +
-        "channel='" + channel + '\'' +
-        ", data=" + ByteBufUtil.hexDump(data) +
-        '}';
+    return "PluginMessage{"
+        + "channel='" + channel + '\''
+        + ", data=" + ByteBufUtil.hexDump(data)
+        + '}';
   }
 
   @Override

proxy/src/main/java/com/velocitypowered/proxy/protocol/packet/Respawn.java

@@ -57,12 +57,12 @@ public class Respawn implements MinecraftPacket {
 
   @Override
   public String toString() {
-    return "Respawn{" +
-        "dimension=" + dimension +
-        ", difficulty=" + difficulty +
-        ", gamemode=" + gamemode +
-        ", levelType='" + levelType + '\'' +
-        '}';
+    return "Respawn{"
+        + "dimension=" + dimension
+        + ", difficulty=" + difficulty
+        + ", gamemode=" + gamemode
+        + ", levelType='" + levelType + '\''
+        + '}';
   }
 
   @Override

proxy/src/main/java/com/velocitypowered/proxy/protocol/packet/ServerLogin.java

@@ -28,9 +28,9 @@ public class ServerLogin implements MinecraftPacket {
 
   @Override
   public String toString() {
-    return "ServerLogin{" +
-        "username='" + username + '\'' +
-        '}';
+    return "ServerLogin{"
+        + "username='" + username + '\''
+        + '}';
   }
 
   @Override

proxy/src/main/java/com/velocitypowered/proxy/protocol/packet/ServerLoginSuccess.java

@@ -37,10 +37,10 @@ public class ServerLoginSuccess implements MinecraftPacket {
 
   @Override
   public String toString() {
-    return "ServerLoginSuccess{" +
-        "uuid=" + uuid +
-        ", username='" + username + '\'' +
-        '}';
+    return "ServerLoginSuccess{"
+        + "uuid=" + uuid
+        + ", username='" + username + '\''
+        + '}';
   }
 
   @Override

proxy/src/main/java/com/velocitypowered/proxy/protocol/packet/SetCompression.java

@@ -27,9 +27,9 @@ public class SetCompression implements MinecraftPacket {
 
   @Override
   public String toString() {
-    return "SetCompression{" +
-        "threshold=" + threshold +
-        '}';
+    return "SetCompression{"
+        + "threshold=" + threshold
+        + '}';
   }
 
   @Override

proxy/src/main/java/com/velocitypowered/proxy/protocol/packet/StatusResponse.java

@@ -27,9 +27,9 @@ public class StatusResponse implements MinecraftPacket {
 
   @Override
   public String toString() {
-    return "StatusResponse{" +
-        "status='" + status + '\'' +
-        '}';
+    return "StatusResponse{"
+        + "status='" + status + '\''
+        + '}';
   }
 
   @Override

proxy/src/main/java/com/velocitypowered/proxy/protocol/packet/TabCompleteRequest.java

@@ -53,12 +53,12 @@ public class TabCompleteRequest implements MinecraftPacket {
 
   @Override
   public String toString() {
-    return "TabCompleteRequest{" +
-        "command='" + command + '\'' +
-        ", assumeCommand=" + assumeCommand +
-        ", hasPosition=" + hasPosition +
-        ", position=" + position +
-        '}';
+    return "TabCompleteRequest{"
+        + "command='" + command + '\''
+        + ", assumeCommand=" + assumeCommand
+        + ", hasPosition=" + hasPosition
+        + ", position=" + position
+        + '}';
   }
 
   @Override

proxy/src/main/java/com/velocitypowered/proxy/protocol/packet/TabCompleteResponse.java

@@ -18,9 +18,9 @@ public class TabCompleteResponse implements MinecraftPacket {
 
   @Override
   public String toString() {
-    return "TabCompleteResponse{" +
-        "offers=" + offers +
-        '}';
+    return "TabCompleteResponse{"
+        + "offers=" + offers
+        + '}';
   }
 
   @Override

proxy/src/main/java/com/velocitypowered/proxy/protocol/packet/TitlePacket.java

@@ -141,13 +141,13 @@ public class TitlePacket implements MinecraftPacket {
 
   @Override
   public String toString() {
-    return "TitlePacket{" +
-        "action=" + action +
-        ", component='" + component + '\'' +
-        ", fadeIn=" + fadeIn +
-        ", stay=" + stay +
-        ", fadeOut=" + fadeOut +
-        '}';
+    return "TitlePacket{"
+        + "action=" + action
+        + ", component='" + component + '\''
+        + ", fadeIn=" + fadeIn
+        + ", stay=" + stay
+        + ", fadeOut=" + fadeOut
+        + '}';
   }
 
   @Override

proxy/src/main/java/com/velocitypowered/proxy/protocol/util/PluginMessageUtil.java

@@ -13,12 +13,12 @@ import java.util.List;
 
 public class PluginMessageUtil {
 
-  public static final String BRAND_CHANNEL_LEGACY = "MC|Brand";
-  public static final String BRAND_CHANNEL = "minecraft:brand";
-  public static final String REGISTER_CHANNEL_LEGACY = "REGISTER";
-  public static final String REGISTER_CHANNEL = "minecraft:register";
-  public static final String UNREGISTER_CHANNEL_LEGACY = "UNREGISTER";
-  public static final String UNREGISTER_CHANNEL = "minecraft:unregister";
+  private static final String BRAND_CHANNEL_LEGACY = "MC|Brand";
+  private static final String BRAND_CHANNEL = "minecraft:brand";
+  private static final String REGISTER_CHANNEL_LEGACY = "REGISTER";
+  private static final String REGISTER_CHANNEL = "minecraft:register";
+  private static final String UNREGISTER_CHANNEL_LEGACY = "UNREGISTER";
+  private static final String UNREGISTER_CHANNEL = "minecraft:unregister";
 
   private PluginMessageUtil() {
     throw new AssertionError();
@@ -62,7 +62,7 @@ public class PluginMessageUtil {
     return message;
   }
 
-  public static PluginMessage rewriteMCBrand(PluginMessage message) {
+  public static PluginMessage rewriteMinecraftBrand(PluginMessage message) {
     Preconditions.checkNotNull(message, "message");
     Preconditions.checkArgument(isMCBrand(message), "message is not a MC Brand plugin message");
 

proxy/src/main/java/com/velocitypowered/proxy/server/PingSessionHandler.java

@@ -1,4 +1,4 @@
-package com.velocitypowered.proxy.server.ping;
+package com.velocitypowered.proxy.server;
 
 import com.velocitypowered.api.proxy.server.RegisteredServer;
 import com.velocitypowered.api.proxy.server.ServerPing;
@@ -20,7 +20,7 @@ public class PingSessionHandler implements MinecraftSessionHandler {
   private final MinecraftConnection connection;
   private boolean completed = false;
 
-  public PingSessionHandler(CompletableFuture<ServerPing> result, RegisteredServer server,
+  PingSessionHandler(CompletableFuture<ServerPing> result, RegisteredServer server,
       MinecraftConnection connection) {
     this.result = result;
     this.server = server;

proxy/src/main/java/com/velocitypowered/proxy/server/ServerMap.java

@@ -21,6 +21,12 @@ public class ServerMap {
     this.server = server;
   }
 
+  /**
+   * Returns the server associated with the given name.
+   *
+   * @param name the name to look up
+   * @return the server, if it exists
+   */
   public Optional<RegisteredServer> getServer(String name) {
     Preconditions.checkNotNull(name, "server");
     String lowerName = name.toLowerCase(Locale.US);
@@ -31,6 +37,12 @@ public class ServerMap {
     return ImmutableList.copyOf(servers.values());
   }
 
+  /**
+   * Registers a server with the proxy.
+   *
+   * @param serverInfo the server to register
+   * @return the registered server
+   */
   public RegisteredServer register(ServerInfo serverInfo) {
     Preconditions.checkNotNull(serverInfo, "serverInfo");
     String lowerName = serverInfo.getName().toLowerCase(Locale.US);
@@ -47,6 +59,11 @@ public class ServerMap {
     }
   }
 
+  /**
+   * Unregisters the specified server from the proxy.
+   *
+   * @param serverInfo the server to unregister
+   */
   public void unregister(ServerInfo serverInfo) {
     Preconditions.checkNotNull(serverInfo, "serverInfo");
     String lowerName = serverInfo.getName().toLowerCase(Locale.US);

proxy/src/main/java/com/velocitypowered/proxy/server/VelocityRegisteredServer.java

@@ -24,7 +24,6 @@ import com.velocitypowered.proxy.protocol.netty.MinecraftDecoder;
 import com.velocitypowered.proxy.protocol.netty.MinecraftEncoder;
 import com.velocitypowered.proxy.protocol.netty.MinecraftVarintFrameDecoder;
 import com.velocitypowered.proxy.protocol.netty.MinecraftVarintLengthEncoder;
-import com.velocitypowered.proxy.server.ping.PingSessionHandler;
 import io.netty.channel.Channel;
 import io.netty.channel.ChannelFuture;
 import io.netty.channel.ChannelFutureListener;

proxy/src/main/java/com/velocitypowered/proxy/util/AddressUtil.java

@@ -4,9 +4,17 @@ import com.google.common.base.Preconditions;
 import java.net.InetSocketAddress;
 import java.net.URI;
 
-public enum AddressUtil {
-  ;
+public class AddressUtil {
+  private AddressUtil() {
+    throw new AssertionError();
+  }
 
+  /**
+   * Attempts to parse an IP address of the form <code>127.0.0.1:25565</code>.
+   *
+   * @param ip the IP to parse
+   * @return the parsed address
+   */
   public static InetSocketAddress parseAddress(String ip) {
     Preconditions.checkNotNull(ip, "ip");
     URI uri = URI.create("tcp://" + ip);

proxy/src/main/java/com/velocitypowered/proxy/util/EncryptionUtils.java

@@ -12,6 +12,12 @@ import javax.crypto.Cipher;
 public enum EncryptionUtils {
   ;
 
+  /**
+   * Generates an RSA key pair.
+   *
+   * @param keysize the key size (in bits) for the RSA key pair
+   * @return the generated key pair
+   */
   public static KeyPair createRsaKeyPair(final int keysize) {
     try {
       final KeyPairGenerator generator = KeyPairGenerator.getInstance("RSA");
@@ -22,16 +28,37 @@ public enum EncryptionUtils {
     }
   }
 
+  /**
+   * Generates a hex digest in two's complement form for use with the Mojang joinedServer endpoint.
+   *
+   * @param digest the bytes to digest
+   * @return the hex digest
+   */
   public static String twosComplementHexdigest(byte[] digest) {
     return new BigInteger(digest).toString(16);
   }
 
+  /**
+   * Decrypts an RSA message.
+   *
+   * @param keyPair the key pair to use
+   * @param bytes the bytes of the encrypted message
+   * @return the decrypted message
+   * @throws GeneralSecurityException if the message couldn't be decoded
+   */
   public static byte[] decryptRsa(KeyPair keyPair, byte[] bytes) throws GeneralSecurityException {
     Cipher cipher = Cipher.getInstance("RSA");
     cipher.init(Cipher.DECRYPT_MODE, keyPair.getPrivate());
     return cipher.doFinal(bytes);
   }
 
+  /**
+   * Generates the server ID for the hasJoined endpoint.
+   *
+   * @param sharedSecret the shared secret between the client and the proxy
+   * @param key the RSA public key
+   * @return the server ID
+   */
   public static String generateServerId(byte[] sharedSecret, PublicKey key) {
     try {
       MessageDigest digest = MessageDigest.getInstance("SHA-1");

proxy/src/main/java/com/velocitypowered/proxy/util/Ratelimiter.java

@@ -8,6 +8,9 @@ import java.net.InetAddress;
 import java.util.concurrent.ExecutionException;
 import java.util.concurrent.TimeUnit;
 
+/**
+ * A simple rate-limiter based on a Guava {@link Cache}.
+ */
 public class Ratelimiter {
 
   private final Cache<InetAddress, Long> expiringCache;
@@ -32,6 +35,12 @@ public class Ratelimiter {
     }
   }
 
+  /**
+   * Attempts to rate-limit the client.
+   *
+   * @param address the address to rate limit
+   * @return true if we should allow the client, false if we should rate-limit
+   */
   public boolean attempt(InetAddress address) {
     if (timeoutNanos == 0) {
       return true;

proxy/src/main/java/com/velocitypowered/proxy/util/ThrowableUtils.java

@@ -1,7 +1,9 @@
 package com.velocitypowered.proxy.util;
 
-public enum ThrowableUtils {
-  ;
+public class ThrowableUtils {
+  private ThrowableUtils() {
+    throw new AssertionError();
+  }
 
   public static String briefDescription(Throwable throwable) {
     return throwable.getClass().getSimpleName() + ": " + throwable.getMessage();

proxy/src/main/java/com/velocitypowered/proxy/util/VelocityChannelRegistrar.java

@@ -46,6 +46,11 @@ public class VelocityChannelRegistrar implements ChannelRegistrar {
     return ImmutableList.copyOf(identifierMap.keySet());
   }
 
+  /**
+   * Returns all channel IDs (as strings) for use with Minecraft 1.13 and above.
+   *
+   * @return the channel IDs for Minecraft 1.13 and above
+   */
   public Collection<String> getModernChannelIds() {
     Collection<String> ids = new ArrayList<>();
     for (ChannelIdentifier value : identifierMap.values()) {