Fix: revert wrongfully deleted line breaks

Refs #88

src/main/java/ch/unibas/dmi/dbis/cs108/casono/server/app/commands/check_nick/CheckUsernameHandler.java

@@ -1,12 +1,15 @@
 package ch.unibas.dmi.dbis.cs108.casono.server.app.commands.check_nick;
+
 import ch.unibas.dmi.dbis.cs108.casono.server.domain.user.User;
 import ch.unibas.dmi.dbis.cs108.casono.server.domain.user.UserRegistry;
 import ch.unibas.dmi.dbis.cs108.casono.server.network.command.execution.CommandHandler;
 import ch.unibas.dmi.dbis.cs108.casono.server.network.protocol.response.dispatcher.ResponseDispatcher;
 import java.util.Optional;
+
 /** Handles {@link CheckUsernameRequest}s to check whether a username is available. */
 public class CheckUsernameHandler extends CommandHandler<CheckUsernameRequest> {
     private final UserRegistry userRegistry;
+
     /**
      * Creates a new handler for checking username availability.
      *
@@ -17,6 +20,7 @@ public class CheckUsernameHandler extends CommandHandler<CheckUsernameRequest> {
         super(responseDispatcher);
         this.userRegistry = userRegistry;
     }
+
     /**
      * Executes the username availability check for the given request.
      *

src/main/java/ch/unibas/dmi/dbis/cs108/casono/server/app/commands/check_nick/CheckUsernameParser.java

@@ -1,7 +1,9 @@
 package ch.unibas.dmi.dbis.cs108.casono.server.app.commands.check_nick;
+
 import ch.unibas.dmi.dbis.cs108.casono.server.network.command.parsing.CommandParser;
 import ch.unibas.dmi.dbis.cs108.casono.server.network.protocol.request.PrimitiveRequest;
 import ch.unibas.dmi.dbis.cs108.casono.server.network.protocol.request.accessor.RequestParameterAccessor;
+
 /** Parses a primitive request into a {@link CheckUsernameRequest}. */
 public class CheckUsernameParser implements CommandParser<CheckUsernameRequest> {
     /**

src/main/java/ch/unibas/dmi/dbis/cs108/casono/server/app/commands/check_nick/CheckUsernameRequest.java

@@ -1,9 +1,12 @@
 package ch.unibas.dmi.dbis.cs108.casono.server.app.commands.check_nick;
+
 import ch.unibas.dmi.dbis.cs108.casono.server.network.protocol.request.Request;
 import ch.unibas.dmi.dbis.cs108.casono.server.network.protocol.request.RequestContext;
+
 /** Request implementation used to check whether a username is available or already taken */
 public class CheckUsernameRequest extends Request {
     private final String username;
+
     /**
      * Constructs a new CheckUsernameRequest with the given context and username to check
      *
@@ -15,6 +18,7 @@ public class CheckUsernameRequest extends Request {
         super(context);
         this.username = username;
     }
+
     /**
      * Returns the provided username in the request
      *

src/main/java/ch/unibas/dmi/dbis/cs108/casono/server/app/commands/check_nick/CheckUsernameResponse.java

@@ -3,6 +3,7 @@ package ch.unibas.dmi.dbis.cs108.casono.server.app.commands.check_nick;
 import ch.unibas.dmi.dbis.cs108.casono.server.network.protocol.request.RequestContext;
 import ch.unibas.dmi.dbis.cs108.casono.server.network.protocol.response.SuccessResponse;
 import ch.unibas.dmi.dbis.cs108.casono.server.network.protocol.response.builder.ResponseBodyBuilder;
+
 /** Response indicating the availability status of a username check. */
 public class CheckUsernameResponse extends SuccessResponse {
     /**