Rename to Impl since no other ciphers left

util/src/main/java/org/cryptomator/util/crypto/BiometricAuthCryptor.java

@@ -52,7 +52,7 @@ public class BiometricAuthCryptor {
 	}
 
 	public String decrypt(javax.crypto.Cipher cipher, String password) throws IllegalBlockSizeException, BadPaddingException {
-		byte[] ciphered = cipher.doFinal(CipherFromApi23.getBytes(password.getBytes(ISO_8859_1)));
+		byte[] ciphered = cipher.doFinal(CipherImpl.getBytes(password.getBytes(ISO_8859_1)));
 		return new String(ciphered, UTF_8);
 	}
 }

util/src/main/java/org/cryptomator/util/crypto/CipherImpl.java

@@ -8,14 +8,14 @@ import javax.crypto.spec.IvParameterSpec;
 
 import static java.lang.System.arraycopy;
 
-class CipherFromApi23 implements Cipher {
+class CipherImpl implements Cipher {
 
 	private static final int IV_LENGTH = 16;
 
 	private final javax.crypto.Cipher cipher;
 	private final SecretKey key;
 
-	CipherFromApi23(javax.crypto.Cipher cipher, SecretKey key) {
+	CipherImpl(javax.crypto.Cipher cipher, SecretKey key) {
 		this.cipher = cipher;
 		this.key = key;
 	}

util/src/main/java/org/cryptomator/util/crypto/CryptoOperationsFactory.java

@@ -16,7 +16,7 @@ class CryptoOperationsFactory {
 	}
 
 	private static CryptoOperations createCryptoOperations() {
-		return new CryptoOperationsFromApi23();
+		return new CryptoOperationsImpl();
 	}
 
 }

util/src/main/java/org/cryptomator/util/crypto/CryptoOperationsImpl.java

@@ -10,7 +10,7 @@ import java.security.UnrecoverableKeyException;
 
 import javax.crypto.SecretKey;
 
-class CryptoOperationsFromApi23 implements CryptoOperations {
+class CryptoOperationsImpl implements CryptoOperations {
 
 	@Override
 	public Cipher cryptor(KeyStore keyStore, String alias) throws UnrecoverableStorageKeyException {
@@ -19,7 +19,7 @@ class CryptoOperationsFromApi23 implements CryptoOperations {
 			final javax.crypto.Cipher cipher = javax.crypto.Cipher.getInstance(KeyProperties.KEY_ALGORITHM_AES + "/" //
 					+ KeyProperties.BLOCK_MODE_CBC + "/" //
 					+ KeyProperties.ENCRYPTION_PADDING_PKCS7);
-			return new CipherFromApi23(cipher, key);
+			return new CipherImpl(cipher, key);
 		} catch (UnrecoverableKeyException e) {
 			throw new UnrecoverableStorageKeyException(e);
 		} catch (Exception e) {