build: Add default constructor and javadoc for crypto, datatypes subprojects (#7069)

* javadoc - Adding default constructor and javadoc for :crypto
* javadoc - Adding default constructor and javadoc for :datatypes

---------

Signed-off-by: Usman Saleem <usman@usmans.info>
Co-authored-by: Sally MacFarlane <macfarla.github@gmail.com>

crypto/algorithms/src/main/java/org/hyperledger/besu/crypto/ECPointUtil.java

@@ -24,6 +24,9 @@ import org.bouncycastle.util.BigIntegers;
 
 /** The Ec point util class. */
 public class ECPointUtil {
+  /** Default constructor. */
+  private ECPointUtil() {}
+
   /**
    * From bouncy castle ec point to ECPoint.
    *

crypto/algorithms/src/main/java/org/hyperledger/besu/crypto/KeyPairUtil.java

@@ -38,6 +38,9 @@ public class KeyPairUtil {
   private static final Supplier<SignatureAlgorithm> SIGNATURE_ALGORITHM =
       Suppliers.memoize(SignatureAlgorithmFactory::getInstance);
 
+  /** Default constructor */
+  private KeyPairUtil() {}
+
   /**
    * Load resource file string.
    *

crypto/algorithms/src/main/java/org/hyperledger/besu/crypto/SecureRandomProvider.java

@@ -23,6 +23,9 @@ import java.security.SecureRandom;
 public class SecureRandomProvider {
   private static final SecureRandom publicSecureRandom = secureRandom();
 
+  /** Default constructor. */
+  private SecureRandomProvider() {}
+
   /**
    * Returns a shared instance of secure random intended to be used where the value is used publicly
    *

crypto/algorithms/src/main/java/org/hyperledger/besu/crypto/altbn128/AltBn128Fq12Pairer.java

@@ -20,8 +20,8 @@ import java.math.BigInteger;
 import java.util.Arrays;
 
 /**
- * Adapted from the pc_ecc (Apache 2 License) implementation:
- * https://github.com/ethereum/py_ecc/blob/master/py_ecc/bn128/bn128_field_elements.py
+ * Adapted from the pc_ecc (Apache 2 License) <a
+ * href="https://github.com/ethereum/py_ecc/tree/main/py_ecc/bn128">implementation</a>.
  */
 public class AltBn128Fq12Pairer {
 
@@ -33,6 +33,9 @@ public class AltBn128Fq12Pairer {
       new BigInteger(
           "21888242871839275222246405745257275088548364400416034343698204186575808495617");
 
+  /** Default constructor */
+  private AltBn128Fq12Pairer() {}
+
   /**
    * Pair fq 12.
    *

datatypes/src/main/java/org/hyperledger/besu/datatypes/AccessListEntry.java

@@ -22,7 +22,12 @@ import com.fasterxml.jackson.annotation.JsonProperty;
 import org.apache.tuweni.bytes.Bytes;
 import org.apache.tuweni.bytes.Bytes32;
 
-/** An access list entry as defined in EIP-2930 */
+/**
+ * An access list entry as defined in EIP-2930
+ *
+ * @param address The Address
+ * @param storageKeys List of storage keys
+ */
 public record AccessListEntry(Address address, List<Bytes32> storageKeys) {
   /**
    * Create access list entry.

datatypes/src/main/java/org/hyperledger/besu/datatypes/BlobsWithCommitments.java

@@ -22,7 +22,14 @@ import java.util.Objects;
 /** A class to hold the blobs, commitments, proofs and versioned hashes for a set of blobs. */
 public class BlobsWithCommitments {
 
-  /** A record to hold the blob, commitment, proof and versioned hash for a blob. */
+  /**
+   * A record to hold the blob, commitment, proof and versioned hash for a blob.
+   *
+   * @param blob The blob
+   * @param kzgCommitment The commitment
+   * @param kzgProof The proof
+   * @param versionedHash The versioned hash
+   */
   public record BlobQuad(
       Blob blob, KZGCommitment kzgCommitment, KZGProof kzgProof, VersionedHash versionedHash) {}