4. Add tests
5. Format code (`mvn formatter:format && mvn license:format`)
6. Run tests (`mvn test`)
7. Open Pull Request

---

## Common Development Tasks

### Adding a Protocol Client

1. **Implement `CrawlerClient`**:
```java
public class MyClient extends AbstractCrawlerClient {
    @Override
    public ResponseData execute(RequestData request) { /* ... */ }

    @Override

 * - Uses PBKDF2 for key derivation from master password
 * - Secure wiping of sensitive data
 * - Thread-safe operations
 * - Protection against timing attacks
 */
public class SecureCredentialStorage implements AutoCloseable, Destroyable {

    private static final Logger log = LoggerFactory.getLogger(SecureCredentialStorage.class);

    private static final String ENCRYPTION_ALGORITHM = "AES/GCM/NoPadding";

package migrator

import "database/sql"

// Index implements gorm.Index interface
type Index struct {
	TableName       string
	NameValue       string
	ColumnList      []string
	PrimaryKeyValue sql.NullBool
	UniqueValue     sql.NullBool
	OptionValue     string
}

// Table return the table name of the index.
func (idx Index) Table() string {
	return idx.TableName
}

// Name return the name of the index.

     */
    void handlePotentialDeadlock(PotentialDeadlockException exception);
  }

  /**
   * Pre-defined {@link Policy} implementations.
   *
   * @since 13.0
   */
  public enum Policies implements Policy {
    /**
     * When potential deadlock is detected, this policy results in the throwing of the {@code
     * PotentialDeadlockException} indicating the potential deadlock, which includes stack traces

 *
 * BufferedReader reader = ...;
 * for (String line : iterable(reader)) {
 *     ...
 * }
 * </pre>
 *
 * @author koichik
 */
public class LineIterator implements Iterator<String> {

    /** String object indicating that {@link #line} is empty */
    protected static final String EMPTY = new String();

    /** {@link BufferedReader} */
    protected final BufferedReader reader;

import okhttp3.internal.connection.RealConnectionPool

/**
 * Manages reuse of HTTP and HTTP/2 connections for reduced network latency. HTTP requests that
 * share the same [Address] may share a [Connection]. This class implements the policy
 * of which connections to keep open for future use.
 *
 * @constructor Create a new connection pool with tuning parameters appropriate for a single-user

import org.codelibs.fess.suggest.entity.SuggestItem;
import org.codelibs.fess.suggest.request.Response;

/**
 * Represents the response for popular words request.
 */
public class PopularWordsResponse implements Response {

    /**
     * The index associated with the response.
     */
    protected final String index;

    /**
     * The time taken to generate the response in milliseconds.
     */

 * to prevent them from being treated as critical errors.
 */
@Plugin(name = "ErrorToWarnRewritePolicy", category = Core.CATEGORY_NAME, elementType = "rewritePolicy", printObject = true)
public class ErrorToWarnRewritePolicy implements RewritePolicy {

    /** Array of logger name prefixes to apply the ERROR to WARN conversion */
    private final String[] loggerNames;

    /**

import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

/**
 * Test class for SMB file locking operations.
 * This class is used to test concurrent file access and locking behavior.
 */
public class TestLocking implements Runnable {

    private static final Logger logger = LoggerFactory.getLogger(TestLocking.class);

    /**
     * Default constructor for TestLocking
     */
    public TestLocking() {

import org.apache.maven.model.ActivationOS;
import org.apache.maven.model.Profile;
import org.apache.maven.utils.Os;

/**
 * OperatingSystemProfileActivator
 */
@Deprecated
public class OperatingSystemProfileActivator implements ProfileActivator {

    @Override
    public boolean canDetermineActivation(Profile profile) {
        Activation activation = profile.getActivation();
        return activation != null && activation.getOs() != null;