Fix SpotBugs stuff

proxy/src/main/java/com/velocitypowered/proxy/VelocityServer.java

@@ -276,12 +276,10 @@ public class VelocityServer implements ProxyServer, ForwardingAudience {
               });
             } catch (IOException e) {
               logger.error("Encountered an I/O error whilst loading translations", e);
-              System.exit(1);
             }
           });
     } catch (IOException e) {
       logger.error("Encountered an I/O error whilst loading translations", e);
-      System.exit(1);
       return;
     }
     GlobalTranslator.get().addSource(translationRegistry);

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

@@ -17,6 +17,7 @@
 
 package com.velocitypowered.proxy.util;
 
+import edu.umd.cs.findbugs.annotations.SuppressFBWarnings;
 import java.io.File;
 import java.io.IOException;
 import java.net.URI;
@@ -40,6 +41,7 @@ public class FileSystemUtils {
    * @param path The path to scan within the resource path
    * @param consumer The consumer to visit the resolved path
    */
+  @SuppressFBWarnings({"RCN_REDUNDANT_NULLCHECK_WOULD_HAVE_BEEN_A_NPE"})
   public static boolean visitResources(Class<?> target, Path path, Consumer<Path> consumer)
       throws IOException {
     final File file = new File(target