build: Add default constructor and javadoc for :besu (#7061)

* build - Fix gradle build for Java 21 for besu subproject. 

---------

Signed-off-by: Usman Saleem <usman@usmans.info>

besu/src/main/java/org/hyperledger/besu/Besu.java

@@ -26,6 +26,8 @@ import picocli.CommandLine.RunLast;
 
 /** Besu bootstrap class. */
 public final class Besu {
+  /** Default constructor. */
+  public Besu() {}
 
   /**
    * The main entrypoint to Besu application

besu/src/main/java/org/hyperledger/besu/RunnerBuilder.java

@@ -194,6 +194,9 @@ public class RunnerBuilder {
   private boolean legacyForkIdEnabled;
   private Optional<EnodeDnsConfiguration> enodeDnsConfiguration;
 
+  /** Instantiates a new Runner builder. */
+  public RunnerBuilder() {}
+
   /**
    * Add Vertx.
    *

besu/src/main/java/org/hyperledger/besu/chainimport/RlpBlockImporter.java

@@ -65,6 +65,9 @@ public class RlpBlockImporter implements Closeable {
   private final Stopwatch segmentTimer = Stopwatch.createUnstarted();
   private static final long SEGMENT_SIZE = 1000;
 
+  /** Default Constructor. */
+  public RlpBlockImporter() {}
+
   /**
    * Imports blocks that are stored as concatenated RLP sections in the given file into Besu's block
    * storage.

besu/src/main/java/org/hyperledger/besu/cli/ConfigurationOverviewBuilder.java

@@ -62,6 +62,8 @@ public class ConfigurationOverviewBuilder {
   private BesuPluginContextImpl besuPluginContext;
 
   /**
+   * Create a new ConfigurationOverviewBuilder.
+   *
    * @param logger the logger
    */
   public ConfigurationOverviewBuilder(final Logger logger) {

besu/src/main/java/org/hyperledger/besu/cli/NetworkDeprecationMessage.java

@@ -21,6 +21,7 @@ import java.util.List;
 
 /** The Network deprecation message. */
 public class NetworkDeprecationMessage {
+  private NetworkDeprecationMessage() {}
 
   /**
    * Generate deprecation message for specified testnet network.

besu/src/main/java/org/hyperledger/besu/cli/config/EthNetworkConfig.java

@@ -30,7 +30,14 @@ import java.util.Objects;
 import java.util.Optional;
 import java.util.stream.Collectors;
 
-/** The Eth network config. */
+/**
+ * The Eth network config.
+ *
+ * @param genesisConfigFile Genesis Config File
+ * @param networkId Network Id
+ * @param bootNodes Boot Nodes
+ * @param dnsDiscoveryUrl DNS Discovery URL
+ */
 public record EthNetworkConfig(
     GenesisConfigFile genesisConfigFile,
     BigInteger networkId,

besu/src/main/java/org/hyperledger/besu/cli/converter/DurationMillisConverter.java

@@ -24,6 +24,9 @@ import picocli.CommandLine;
 public class DurationMillisConverter
     implements CommandLine.ITypeConverter<Duration>, TypeFormatter<Duration> {
 
+  /** Default constructor. */
+  public DurationMillisConverter() {}
+
   @Override
   public Duration convert(final String value) throws DurationConversionException {
     try {

besu/src/main/java/org/hyperledger/besu/cli/converter/FractionConverter.java

@@ -22,6 +22,9 @@ import picocli.CommandLine;
 /** The Fraction converter to convert floats in CLI. */
 public class FractionConverter implements CommandLine.ITypeConverter<Fraction> {
 
+  /** Default constructor. */
+  public FractionConverter() {}
+
   @Override
   public Fraction convert(final String value) throws FractionConversionException {
     try {

besu/src/main/java/org/hyperledger/besu/cli/converter/MetricCategoryConverter.java

@@ -29,6 +29,9 @@ public class MetricCategoryConverter implements CommandLine.ITypeConverter<Metri
 
   private final Map<String, MetricCategory> metricCategories = new HashMap<>();
 
+  /** Default Constructor. */
+  public MetricCategoryConverter() {}
+
   @Override
   public MetricCategory convert(final String value) {
     final MetricCategory category = metricCategories.get(value);

besu/src/main/java/org/hyperledger/besu/cli/converter/PercentageConverter.java

@@ -21,6 +21,8 @@ import picocli.CommandLine;
 
 /** The Percentage Cli type converter. */
 public class PercentageConverter implements CommandLine.ITypeConverter<Percentage> {
+  /** Default Constructor. */
+  public PercentageConverter() {}
 
   @Override
   public Percentage convert(final String value) throws PercentageConversionException {

besu/src/main/java/org/hyperledger/besu/cli/converter/PluginInfoConverter.java

@@ -26,6 +26,8 @@ import picocli.CommandLine;
  * intended for use with PicoCLI to process command line arguments that specify plugin information.
  */
 public class PluginInfoConverter implements CommandLine.ITypeConverter<List<PluginInfo>> {
+  /** Default Constructor. */
+  public PluginInfoConverter() {}
 
   /**
    * Converts a comma-separated string into a list of {@link PluginInfo}.

besu/src/main/java/org/hyperledger/besu/cli/converter/PositiveNumberConverter.java

@@ -21,6 +21,8 @@ import picocli.CommandLine;
 
 /** The PositiveNumber Cli type converter. */
 public class PositiveNumberConverter implements CommandLine.ITypeConverter<PositiveNumber> {
+  /** Default Constructor. */
+  public PositiveNumberConverter() {}
 
   @Override
   public PositiveNumber convert(final String value) throws PercentageConversionException {

besu/src/main/java/org/hyperledger/besu/cli/custom/RpcAuthFileValidator.java

@@ -29,6 +29,8 @@ import picocli.CommandLine.ParameterException;
 
 /** The Rpc authentication file validator. */
 public class RpcAuthFileValidator {
+  /** Default Constructor. */
+  RpcAuthFileValidator() {}
 
   /**
    * Validate auth file.

besu/src/main/java/org/hyperledger/besu/cli/error/BesuExecutionExceptionHandler.java

@@ -20,6 +20,10 @@ import picocli.CommandLine.Model.CommandSpec;
 
 /** Custom Execution Exception Handler used by PicoCLI framework. */
 public class BesuExecutionExceptionHandler implements IExecutionExceptionHandler {
+
+  /** Default constructor. */
+  public BesuExecutionExceptionHandler() {}
+
   @Override
   public int handleExecutionException(
       final Exception ex,

besu/src/main/java/org/hyperledger/besu/cli/logging/BesuLoggingConfigurationFactory.java

@@ -21,6 +21,8 @@ import org.apache.logging.log4j.core.config.ConfigurationSource;
 
 /** Custom Log4J Configuration Factory for Besu */
 public class BesuLoggingConfigurationFactory extends ConfigurationFactory {
+  /** Default constructor. */
+  public BesuLoggingConfigurationFactory() {}
 
   @Override
   protected String[] getSupportedTypes() {

besu/src/main/java/org/hyperledger/besu/cli/options/OptionParser.java

@@ -29,6 +29,8 @@ import org.apache.tuweni.units.bigints.UInt256;
 
 /** The Option parser. */
 public class OptionParser {
+  /** Default Constructor. */
+  OptionParser() {}
 
   /**
    * Parse long range range.

besu/src/main/java/org/hyperledger/besu/cli/options/stable/ApiConfigurationOptions.java

@@ -29,6 +29,8 @@ import picocli.CommandLine;
  * and trace filter range.
  */
 public class ApiConfigurationOptions {
+  /** Default constructor. */
+  public ApiConfigurationOptions() {}
 
   @CommandLine.Option(
       names = {"--api-gas-price-blocks"},

besu/src/main/java/org/hyperledger/besu/cli/options/stable/DataStorageOptions.java

@@ -71,6 +71,9 @@ public class DataStorageOptions implements CLIOptions<DataStorageConfiguration>
   @CommandLine.ArgGroup(validate = false)
   private final DataStorageOptions.Unstable unstableOptions = new Unstable();
 
+  /** Default Constructor. */
+  DataStorageOptions() {}
+
   /** The unstable options for data storage. */
   public static class Unstable {
     private static final String BONSAI_LIMIT_TRIE_LOGS_ENABLED =
@@ -113,6 +116,9 @@ public class DataStorageOptions implements CLIOptions<DataStorageConfiguration>
         description =
             "Enables code storage using code hash instead of by account hash. (default: ${DEFAULT-VALUE})")
     private boolean bonsaiCodeUsingCodeHashEnabled = DEFAULT_BONSAI_CODE_USING_CODE_HASH_ENABLED;
+
+    /** Default Constructor. */
+    Unstable() {}
   }
 
   /**

besu/src/main/java/org/hyperledger/besu/cli/options/stable/GraphQlOptions.java

@@ -56,6 +56,9 @@ public class GraphQlOptions {
   private final CorsAllowedOriginsProperty graphQLHttpCorsAllowedOrigins =
       new CorsAllowedOriginsProperty();
 
+  /** Default constructor */
+  public GraphQlOptions() {}
+
   /**
    * Validates the GraphQL HTTP options.
    *

besu/src/main/java/org/hyperledger/besu/cli/options/stable/JsonRpcHttpOptions.java

@@ -208,6 +208,9 @@ public class JsonRpcHttpOptions {
       description = "Enable JSON pretty print format (default: ${DEFAULT-VALUE})")
   private final Boolean prettyJsonEnabled = DEFAULT_PRETTY_JSON_ENABLED;
 
+  /** Default constructor */
+  public JsonRpcHttpOptions() {}
+
   /**
    * Validates the Rpc Http options.
    *

besu/src/main/java/org/hyperledger/besu/cli/options/stable/LoggingLevelOption.java

@@ -23,6 +23,8 @@ import picocli.CommandLine.Spec;
 
 /** The Logging level CLI option. */
 public class LoggingLevelOption {
+  /** Default Constructor. */
+  LoggingLevelOption() {}
 
   /**
    * Create logging level option.

besu/src/main/java/org/hyperledger/besu/cli/options/stable/NodePrivateKeyFileOption.java

@@ -22,6 +22,8 @@ import picocli.CommandLine;
 
 /** The Node private key file Cli option. */
 public class NodePrivateKeyFileOption {
+  /** Default constructor. */
+  NodePrivateKeyFileOption() {}
 
   /**
    * Create node private key file option.

besu/src/main/java/org/hyperledger/besu/cli/options/stable/P2PTLSConfigOptions.java

@@ -103,6 +103,9 @@ public class P2PTLSConfigOptions {
           "Whether to send a SNI header in the TLS ClientHello message (default: ${DEFAULT-VALUE})")
   private final Boolean p2pTlsClientHelloSniHeaderEnabled = false;
 
+  /** Default constructor. */
+  P2PTLSConfigOptions() {}
+
   /**
    * Generate P2p tls configuration.
    *

besu/src/main/java/org/hyperledger/besu/cli/options/stable/PermissionsOptions.java

@@ -83,6 +83,9 @@ public class PermissionsOptions {
           "Enable account level permissions via smart contract (default: ${DEFAULT-VALUE})")
   private final Boolean permissionsAccountsContractEnabled = false;
 
+  /** Default constructor. */
+  public PermissionsOptions() {}
+
   /**
    * Creates a PermissioningConfiguration based on the provided options.
    *

besu/src/main/java/org/hyperledger/besu/cli/options/stable/PluginsConfigurationOptions.java

@@ -37,6 +37,9 @@ public class PluginsConfigurationOptions implements CLIOptions<PluginConfigurati
       arity = "1..*")
   private List<PluginInfo> plugins;
 
+  /** Default Constructor. */
+  public PluginsConfigurationOptions() {}
+
   @Override
   public PluginConfiguration toDomainObject() {
     return new PluginConfiguration(plugins);

besu/src/main/java/org/hyperledger/besu/cli/options/stable/RpcWebsocketOptions.java

@@ -120,6 +120,9 @@ public class RpcWebsocketOptions {
       arity = "1")
   private final File rpcWsAuthenticationPublicKeyFile = null;
 
+  /** Default Constructor. */
+  public RpcWebsocketOptions() {}
+
   /**
    * Validates the WebSocket options.
    *

besu/src/main/java/org/hyperledger/besu/cli/options/unstable/ChainPruningOptions.java

@@ -61,6 +61,9 @@ public class ChainPruningOptions implements CLIOptions<ChainPrunerConfiguration>
   private final PositiveNumber chainDataPruningBlocksFrequency =
       PositiveNumber.fromInt(DEFAULT_CHAIN_DATA_PRUNING_FREQUENCY);
 
+  /** Default Constructor. */
+  ChainPruningOptions() {}
+
   /**
    * Create chain pruning options.
    *

besu/src/main/java/org/hyperledger/besu/cli/options/unstable/DnsOptions.java

@@ -43,6 +43,9 @@ public class DnsOptions implements CLIOptions<EnodeDnsConfiguration> {
       arity = "1")
   private Boolean dnsUpdateEnabled = Boolean.FALSE;
 
+  /** Instantiates a new Dns options. */
+  DnsOptions() {}
+
   /**
    * Create dns options.
    *

besu/src/main/java/org/hyperledger/besu/cli/options/unstable/EvmOptions.java

@@ -30,6 +30,9 @@ public class EvmOptions implements CLIOptions<EvmConfiguration> {
   /** The constant WORLDSTATE_UPDATE_MODE. */
   public static final String WORLDSTATE_UPDATE_MODE = "--Xevm-worldstate-update-mode";
 
+  /** Default constructor. */
+  EvmOptions() {}
+
   /**
    * Create evm options.
    *

besu/src/main/java/org/hyperledger/besu/cli/options/unstable/IpcOptions.java

@@ -25,6 +25,9 @@ import picocli.CommandLine;
 public class IpcOptions {
   private static final String DEFAULT_IPC_FILE = "besu.ipc";
 
+  /** Default constructor. */
+  IpcOptions() {}
+
   /**
    * Create ipc options.
    *

besu/src/main/java/org/hyperledger/besu/cli/options/unstable/NatOptions.java

@@ -37,6 +37,9 @@ public class NatOptions {
       arity = "1")
   private final Boolean natMethodFallbackEnabled = true;
 
+  /** Default constructor. */
+  NatOptions() {}
+
   /**
    * Create nat options.
    *

besu/src/main/java/org/hyperledger/besu/cli/options/unstable/NativeLibraryOptions.java

@@ -55,6 +55,9 @@ public class NativeLibraryOptions {
       arity = "1")
   private final Boolean nativeModExp = Boolean.TRUE;
 
+  /** Default constructor. */
+  NativeLibraryOptions() {}
+
   /**
    * Create native library options.
    *

besu/src/main/java/org/hyperledger/besu/cli/options/unstable/PkiBlockCreationOptions.java

@@ -107,6 +107,9 @@ public class PkiBlockCreationOptions {
       description = "File with all CRLs for PKI Block Creation.")
   Path crlFile = null;
 
+  /** Default Constructor. */
+  PkiBlockCreationOptions() {}
+
   /**
    * As domain config optional.
    *

besu/src/main/java/org/hyperledger/besu/cli/options/unstable/PrivacyPluginOptions.java

@@ -18,6 +18,8 @@ import static picocli.CommandLine.Option;
 
 /** The Privacy plugin Cli options. */
 public class PrivacyPluginOptions {
+  /** Default Constructor. */
+  PrivacyPluginOptions() {}
 
   /**
    * Create privacy plugin options.

besu/src/main/java/org/hyperledger/besu/cli/options/unstable/RPCOptions.java

@@ -35,6 +35,9 @@ public class RPCOptions {
       arity = "1")
   private final Long wsTimeoutSec = TimeoutOptions.defaultOptions().getTimeoutSeconds();
 
+  /** Default Constructor. */
+  RPCOptions() {}
+
   /**
    * Create rpc options.
    *

besu/src/main/java/org/hyperledger/besu/cli/presynctasks/PreSynchronizationTaskRunner.java

@@ -24,6 +24,9 @@ public class PreSynchronizationTaskRunner {
 
   private final List<PreSynchronizationTask> tasks = new ArrayList<>();
 
+  /** Default Constructor. */
+  public PreSynchronizationTaskRunner() {}
+
   /**
    * Add task.
    *

besu/src/main/java/org/hyperledger/besu/cli/subcommands/RetestethSubCommand.java

@@ -89,6 +89,9 @@ public class RetestethSubCommand implements Runnable {
 
   private InetAddress autoDiscoveredDefaultIP;
 
+  /** Default Constructor. */
+  public RetestethSubCommand() {}
+
   // Used to discover the default IP of the client.
   // Loopback IP is used by default as this is how smokeTests require it to be
   // and it's probably a good security behaviour to default only on the localhost.

besu/src/main/java/org/hyperledger/besu/cli/subcommands/operator/BackupState.java

@@ -45,6 +45,9 @@ import picocli.CommandLine.ParentCommand;
     versionProvider = VersionProvider.class)
 public class BackupState implements Runnable {
 
+  /** Default constructor. */
+  public BackupState() {}
+
   @Option(
       names = "--block",
       paramLabel = MANDATORY_LONG_FORMAT_HELP,

besu/src/main/java/org/hyperledger/besu/cli/subcommands/operator/GenerateLogBloomCache.java

@@ -59,6 +59,9 @@ public class GenerateLogBloomCache implements Runnable {
 
   @ParentCommand private OperatorSubCommand parentCommand;
 
+  /** Default constructor. */
+  public GenerateLogBloomCache() {}
+
   @SuppressWarnings("ResultOfMethodCallIgnored")
   @Override
   public void run() {

besu/src/main/java/org/hyperledger/besu/cli/subcommands/operator/RestoreState.java

@@ -83,6 +83,9 @@ public class RestoreState implements Runnable {
   private BesuController besuController;
   private ForestWorldStateKeyValueStorage.Updater updater;
 
+  /** Default Constructor. */
+  RestoreState() {}
+
   private Path accountFileName(final int fileNumber, final boolean compressed) {
     return StateBackupService.accountFileName(backupDir, targetBlock, fileNumber, compressed);
   }

besu/src/main/java/org/hyperledger/besu/cli/subcommands/rlp/IbftExtraDataCLIAdapter.java

@@ -34,6 +34,9 @@ public class IbftExtraDataCLIAdapter implements JSONToRLP {
   private static final ObjectMapper MAPPER = new ObjectMapper();
   private static final TypeReference<Collection<String>> TYPE_REF = new TypeReference<>() {};
 
+  /** Default constructor. */
+  public IbftExtraDataCLIAdapter() {}
+
   @Override
   public Bytes encode(final String json) throws IOException {
     return fromJsonAddresses(json);

besu/src/main/java/org/hyperledger/besu/cli/subcommands/rlp/QbftExtraDataCLIAdapter.java

@@ -31,6 +31,9 @@ public class QbftExtraDataCLIAdapter implements JSONToRLP {
   private static final ObjectMapper MAPPER = new ObjectMapper();
   private static final TypeReference<Collection<String>> TYPE_REF = new TypeReference<>() {};
 
+  /** Default Constructor. */
+  public QbftExtraDataCLIAdapter() {}
+
   @Override
   public Bytes encode(final String json) throws IOException {
     return fromJsonAddresses(json);

besu/src/main/java/org/hyperledger/besu/cli/subcommands/storage/RevertMetadataSubCommand.java

@@ -57,6 +57,9 @@ public class RevertMetadataSubCommand implements Runnable {
   @CommandLine.Spec
   private CommandLine.Model.CommandSpec spec;
 
+  /** Default Constructor. */
+  public RevertMetadataSubCommand() {}
+
   @Override
   public void run() {
     spec.commandLine().usage(System.out);

besu/src/main/java/org/hyperledger/besu/cli/subcommands/storage/RocksDbHelper.java

@@ -35,6 +35,9 @@ import org.slf4j.LoggerFactory;
 public class RocksDbHelper {
   private static final Logger LOG = LoggerFactory.getLogger(RocksDbHelper.class);
 
+  /** Default Constructor. */
+  RocksDbHelper() {}
+
   static void forEachColumnFamily(
       final String dbPath, final BiConsumer<RocksDB, ColumnFamilyHandle> task) {
     RocksDB.loadLibrary();

besu/src/main/java/org/hyperledger/besu/cli/subcommands/storage/RocksDbSubCommand.java

@@ -44,6 +44,9 @@ public class RocksDbSubCommand implements Runnable {
   @CommandLine.Spec
   private CommandLine.Model.CommandSpec spec;
 
+  /** Default Constructor. */
+  public RocksDbSubCommand() {}
+
   @Override
   public void run() {
     spec.commandLine().usage(System.out);

besu/src/main/java/org/hyperledger/besu/cli/subcommands/storage/TrieLogHelper.java

@@ -59,6 +59,9 @@ public class TrieLogHelper {
   private static final int ROCKSDB_MAX_INSERTS_PER_TRANSACTION = 1000;
   private static final Logger LOG = LoggerFactory.getLogger(TrieLogHelper.class);
 
+  /** Default Constructor. */
+  public TrieLogHelper() {}
+
   boolean prune(
       final DataStorageConfiguration config,
       final BonsaiWorldStateKeyValueStorage rootWorldStateStorage,

besu/src/main/java/org/hyperledger/besu/cli/subcommands/storage/TrieLogSubCommand.java

@@ -71,6 +71,9 @@ public class TrieLogSubCommand implements Runnable {
   @CommandLine.Spec
   private CommandLine.Model.CommandSpec spec; // Picocli injects reference to command spec
 
+  /** Default Constructor. */
+  TrieLogSubCommand() {}
+
   @Override
   public void run() {
     final PrintWriter out = spec.commandLine().getOut();

besu/src/main/java/org/hyperledger/besu/cli/util/AbstractConfigurationFinder.java

@@ -27,6 +27,8 @@ import picocli.CommandLine;
  * @param <T> the type of configuration resource this finder will return
  */
 public abstract class AbstractConfigurationFinder<T> {
+  /** Default Constructor. */
+  public AbstractConfigurationFinder() {}
 
   /**
    * Returns the name of the configuration option.

besu/src/main/java/org/hyperledger/besu/cli/util/CommandLineUtils.java

@@ -48,6 +48,8 @@ public class CommandLineUtils {
   public static final String DEPRECATED_AND_USELESS_WARNING_MSG =
       "{} has been deprecated and is now useless, remove it.";
 
+  private CommandLineUtils() {}
+
   /**
    * Check if options are passed that require an option to be true to have any effect and log a
    * warning with the list of affected options.

besu/src/main/java/org/hyperledger/besu/cli/util/ConfigFileFinder.java

@@ -30,6 +30,9 @@ import picocli.CommandLine;
 public class ConfigFileFinder extends AbstractConfigurationFinder<File> {
   private static final String CONFIG_FILE_ENV_NAME = "BESU_CONFIG_FILE";
 
+  /** Default constructor. */
+  public ConfigFileFinder() {}
+
   /**
    * Returns the name of the configuration option.
    *

besu/src/main/java/org/hyperledger/besu/cli/util/ProfileFinder.java

@@ -34,6 +34,9 @@ import picocli.CommandLine;
 public class ProfileFinder extends AbstractConfigurationFinder<InputStream> {
   private static final String PROFILE_ENV_NAME = "BESU_PROFILE";
 
+  /** Default Constructor. */
+  public ProfileFinder() {}
+
   @Override
   protected String getConfigOptionName() {
     return PROFILE_OPTION_NAME;

besu/src/main/java/org/hyperledger/besu/components/BesuCommandModule.java

@@ -37,6 +37,8 @@ import org.slf4j.Logger;
  */
 @Module
 public class BesuCommandModule {
+  /** Default constructor. */
+  public BesuCommandModule() {}
 
   @Provides
   @Singleton

besu/src/main/java/org/hyperledger/besu/components/BesuPluginContextModule.java

@@ -26,6 +26,9 @@ import dagger.Provides;
 @Module
 public class BesuPluginContextModule {
 
+  /** Default constructor. */
+  public BesuPluginContextModule() {}
+
   /**
    * Creates a BesuPluginContextImpl, used for plugin service discovery.
    *

besu/src/main/java/org/hyperledger/besu/controller/BesuController.java

@@ -311,6 +311,8 @@ public class BesuController implements java.io.Closeable {
 
   /** The type Builder. */
   public static class Builder {
+    /** Instantiates a new Builder. */
+    public Builder() {}
 
     /**
      * From eth network config besu controller builder.

besu/src/main/java/org/hyperledger/besu/controller/BesuControllerBuilder.java

@@ -205,6 +205,9 @@ public abstract class BesuControllerBuilder implements MiningParameterOverrides
 
   private int numberOfBlocksToCache = 0;
 
+  /** Instantiates a new Besu controller builder. */
+  protected BesuControllerBuilder() {}
+
   /**
    * Provide a BesuComponent which can be used to get other dependencies
    *

besu/src/main/java/org/hyperledger/besu/controller/BftBesuControllerBuilder.java

@@ -24,6 +24,9 @@ import com.google.common.base.Suppliers;
 /** Base class for BFT based Besu Controller Builders. */
 public abstract class BftBesuControllerBuilder extends BesuControllerBuilder {
 
+  /** Default constructor to be used by subclasses. */
+  protected BftBesuControllerBuilder() {}
+
   /**
    * Bft extra data codec supplier.
    *

besu/src/main/java/org/hyperledger/besu/controller/CliqueBesuControllerBuilder.java

@@ -57,6 +57,9 @@ public class CliqueBesuControllerBuilder extends BesuControllerBuilder {
   private final BlockInterface blockInterface = new CliqueBlockInterface();
   private ForksSchedule<CliqueConfigOptions> forksSchedule;
 
+  /** Default constructor. */
+  public CliqueBesuControllerBuilder() {}
+
   @Override
   protected void prepForBuild() {
     localAddress = Util.publicKeyToAddress(nodeKey.getPublicKey());

besu/src/main/java/org/hyperledger/besu/controller/IbftBesuControllerBuilder.java

@@ -94,6 +94,9 @@ public class IbftBesuControllerBuilder extends BftBesuControllerBuilder {
   private ForksSchedule<BftConfigOptions> forksSchedule;
   private ValidatorPeers peers;
 
+  /** Default Constructor */
+  public IbftBesuControllerBuilder() {}
+
   @Override
   protected Supplier<BftExtraDataCodec> bftExtraDataCodec() {
     return Suppliers.memoize(IbftExtraDataCodec::new);

besu/src/main/java/org/hyperledger/besu/controller/MainnetBesuControllerBuilder.java

@@ -36,6 +36,9 @@ public class MainnetBesuControllerBuilder extends BesuControllerBuilder {
 
   private EpochCalculator epochCalculator = new EpochCalculator.DefaultEpochCalculator();
 
+  /** Default constructor. */
+  public MainnetBesuControllerBuilder() {}
+
   @Override
   protected MiningCoordinator createMiningCoordinator(
       final ProtocolSchedule protocolSchedule,

besu/src/main/java/org/hyperledger/besu/controller/MergeBesuControllerBuilder.java

@@ -58,6 +58,9 @@ public class MergeBesuControllerBuilder extends BesuControllerBuilder {
   private final AtomicReference<SyncState> syncState = new AtomicReference<>();
   private static final Logger LOG = LoggerFactory.getLogger(MergeBesuControllerBuilder.class);
 
+  /** Default constructor. */
+  public MergeBesuControllerBuilder() {}
+
   @Override
   protected MiningCoordinator createMiningCoordinator(
       final ProtocolSchedule protocolSchedule,

besu/src/main/java/org/hyperledger/besu/controller/NoopPluginServiceFactory.java

@@ -18,6 +18,8 @@ import org.hyperledger.besu.services.BesuPluginContextImpl;
 
 /** The Noop plugin service factory. */
 public class NoopPluginServiceFactory implements PluginServiceFactory {
+  /** Default Constructor. */
+  public NoopPluginServiceFactory() {}
 
   @Override
   public void appendPluginServices(final BesuPluginContextImpl besuContext) {}

besu/src/main/java/org/hyperledger/besu/controller/QbftBesuControllerBuilder.java

@@ -106,6 +106,9 @@ public class QbftBesuControllerBuilder extends BftBesuControllerBuilder {
   private ValidatorPeers peers;
   private TransactionValidatorProvider transactionValidatorProvider;
 
+  /** Default Constructor. */
+  public QbftBesuControllerBuilder() {}
+
   @Override
   protected Supplier<BftExtraDataCodec> bftExtraDataCodec() {
     return Suppliers.memoize(

besu/src/main/java/org/hyperledger/besu/services/BesuConfigurationImpl.java

@@ -29,6 +29,9 @@ public class BesuConfigurationImpl implements BesuConfiguration {
   private DataStorageConfiguration dataStorageConfiguration;
   private MiningParameters miningParameters;
 
+  /** Default Constructor. */
+  public BesuConfigurationImpl() {}
+
   /**
    * Post creation initialization
    *

besu/src/main/java/org/hyperledger/besu/services/BesuPluginContextImpl.java

@@ -84,6 +84,9 @@ public class BesuPluginContextImpl implements BesuContext, PluginVersionsProvide
 
   private final List<String> pluginVersions = new ArrayList<>();
 
+  /** Instantiates a new Besu plugin context. */
+  public BesuPluginContextImpl() {}
+
   /**
    * Add service.
    *

besu/src/main/java/org/hyperledger/besu/services/PermissioningServiceImpl.java

@@ -28,6 +28,9 @@ public class PermissioningServiceImpl implements PermissioningService {
   private final List<NodeConnectionPermissioningProvider> connectionPermissioningProviders =
       Lists.newArrayList();
 
+  /** Default Constructor. */
+  public PermissioningServiceImpl() {}
+
   @Override
   public void registerNodePermissioningProvider(
       final NodeConnectionPermissioningProvider provider) {

besu/src/main/java/org/hyperledger/besu/services/PrivacyPluginServiceImpl.java

@@ -34,6 +34,9 @@ public class PrivacyPluginServiceImpl implements PrivacyPluginService {
       (privacyGroupId, privacyUserId, blockNumber) -> true;
   private PrivacyGroupGenesisProvider privacyGroupGenesisProvider;
 
+  /** Default Constructor. */
+  public PrivacyPluginServiceImpl() {}
+
   @Override
   public void setPayloadProvider(final PrivacyPluginPayloadProvider privacyPluginPayloadProvider) {
     this.privacyPluginPayloadProvider = privacyPluginPayloadProvider;

besu/src/main/java/org/hyperledger/besu/services/RpcEndpointServiceImpl.java

@@ -33,6 +33,9 @@ import java.util.stream.Collectors;
 public class RpcEndpointServiceImpl implements RpcEndpointService {
   private final Map<String, Function<PluginRpcRequest, ?>> rpcMethods = new HashMap<>();
 
+  /** Default Constructor. */
+  public RpcEndpointServiceImpl() {}
+
   @Override
   public <T> void registerRPCEndpoint(
       final String namespace,

besu/src/main/java/org/hyperledger/besu/services/SecurityModuleServiceImpl.java

@@ -27,6 +27,9 @@ public class SecurityModuleServiceImpl implements SecurityModuleService {
   private final Map<String, Supplier<SecurityModule>> securityModuleSuppliers =
       new ConcurrentHashMap<>();
 
+  /** Default Constructor. */
+  public SecurityModuleServiceImpl() {}
+
   @Override
   public void register(final String name, final Supplier<SecurityModule> securityModuleSupplier) {
     securityModuleSuppliers.put(name, securityModuleSupplier);

besu/src/main/java/org/hyperledger/besu/services/TransactionPoolValidatorServiceImpl.java

@@ -25,6 +25,9 @@ public class TransactionPoolValidatorServiceImpl implements TransactionPoolValid
 
   private Optional<PluginTransactionPoolValidatorFactory> factory = Optional.empty();
 
+  /** Default Constructor. */
+  public TransactionPoolValidatorServiceImpl() {}
+
   @Override
   public PluginTransactionPoolValidator createTransactionValidator() {
     return factory

besu/src/main/java/org/hyperledger/besu/services/TransactionSelectionServiceImpl.java

@@ -25,6 +25,9 @@ public class TransactionSelectionServiceImpl implements TransactionSelectionServ
 
   private Optional<PluginTransactionSelectorFactory> factory = Optional.empty();
 
+  /** Default Constructor. */
+  public TransactionSelectionServiceImpl() {}
+
   @Override
   public PluginTransactionSelector createPluginTransactionSelector() {
     return factory

besu/src/main/java/org/hyperledger/besu/util/PermissioningConfigurationValidator.java

@@ -26,6 +26,8 @@ import java.util.stream.Collectors;
 
 /** The Permissioning configuration validator. */
 public class PermissioningConfigurationValidator {
+  /** Default Constructor. */
+  PermissioningConfigurationValidator() {}
 
   /**
    * Check if all nodes are in allowlist.

besu/src/main/java/org/hyperledger/besu/util/StringUtils.java

@@ -19,6 +19,8 @@ import java.util.function.Function;
 
 /** some useful tools to display strings in command line help or error messages */
 public class StringUtils {
+  /** Default Constructor. */
+  StringUtils() {}
 
   /**
    * Joins a list into string elements with a delimiter but having a last different delimiter

besu/src/test/java/org/hyperledger/besu/cli/options/stable/LoggingLevelOptionTest.java

@@ -33,7 +33,7 @@ public class LoggingLevelOptionTest {
 
   @BeforeEach
   public void setUp() {
-    levelOption = new LoggingLevelOption();
+    levelOption = LoggingLevelOption.create();
   }
 
   @Test

besu/src/test/java/org/hyperledger/besu/cli/util/ConfigDefaultValueProviderStrategyTest.java

@@ -82,7 +82,7 @@ public class ConfigDefaultValueProviderStrategyTest {
         .thenReturn(mockConfigOptionSpec);
     lenient().when(mockParseResult.hasMatchedOption(CONFIG_FILE_OPTION_NAME)).thenReturn(true);
     lenient().when(mockConfigOptionSpec.getter()).thenReturn(mockConfigOptionGetter);
-    levelOption = new LoggingLevelOption();
+    levelOption = LoggingLevelOption.create();
     levelOption.setLogLevel("INFO");
     configParsingHandler = new ConfigDefaultValueProviderStrategy(resultHandler, environment);
   }