fixed import issue

components/certificate-mgt/org.wso2.carbon.certificate.mgt.core/src/main/java/org/wso2/carbon/certificate/mgt/core/impl/CertificateGenerator.java

@@ -44,7 +44,14 @@ import org.bouncycastle.operator.OperatorCreationException;
 import org.bouncycastle.operator.jcajce.JcaContentSignerBuilder;
 import org.bouncycastle.pkcs.PKCS10CertificationRequest;
 import org.bouncycastle.util.Store;
-import org.jscep.message.*;
+import org.jscep.message.PkcsPkiEnvelopeDecoder;
+import org.jscep.message.PkcsPkiEnvelopeEncoder;
+import org.jscep.message.CertRep;
+import org.jscep.message.PkiMessageEncoder;
+import org.jscep.message.PkiMessageDecoder;
+import org.jscep.message.PkiMessage;
+import org.jscep.message.MessageEncodingException;
+import org.jscep.message.MessageDecodingException;
 import org.jscep.transaction.FailInfo;
 import org.jscep.transaction.Nonce;
 import org.jscep.transaction.TransactionId;
@@ -61,10 +68,30 @@ import org.wso2.carbon.device.mgt.common.TransactionManagementException;
 
 import javax.security.auth.x500.X500Principal;
 import javax.xml.bind.DatatypeConverter;
-import java.io.*;
-import java.security.*;
+import java.io.DataInputStream;
+import java.io.FileNotFoundException;
+import java.io.FileInputStream;
+import java.io.ByteArrayInputStream;
+import java.io.InputStream;
+import java.io.IOException;
+import java.io.File;
+import java.security.Security;
+import java.security.KeyPair;
+import java.security.KeyPairGenerator;
+import java.security.SecureRandom;
+import java.security.NoSuchAlgorithmException;
+import java.security.InvalidKeyException;
+import java.security.KeyFactory;
+import java.security.NoSuchProviderException;
+import java.security.SignatureException;
+import java.security.PrivateKey;
 import java.security.cert.Certificate;
-import java.security.cert.*;
+import java.security.cert.X509Certificate;
+import java.security.cert.CertificateFactory;
+import java.security.cert.CertificateEncodingException;
+import java.security.cert.CertificateException;
+import java.security.cert.CertificateExpiredException;
+import java.security.cert.CertificateNotYetValidException;
 import java.security.spec.InvalidKeySpecException;
 import java.security.spec.PKCS8EncodedKeySpec;
 import java.util.ArrayList;