diff --git a/components/certificate-mgt/org.wso2.carbon.certificate.mgt.core/src/main/java/org/wso2/carbon/certificate/mgt/core/impl/CertificateGenerator.java b/components/certificate-mgt/org.wso2.carbon.certificate.mgt.core/src/main/java/org/wso2/carbon/certificate/mgt/core/impl/CertificateGenerator.java
index 853741206d..fb09454df0 100755
--- a/components/certificate-mgt/org.wso2.carbon.certificate.mgt.core/src/main/java/org/wso2/carbon/certificate/mgt/core/impl/CertificateGenerator.java
+++ b/components/certificate-mgt/org.wso2.carbon.certificate.mgt.core/src/main/java/org/wso2/carbon/certificate/mgt/core/impl/CertificateGenerator.java
@@ -613,7 +613,7 @@ public class CertificateGenerator {
         return null;
     }
 
-    public X509Certificate getSignCertificateFromCSR(String binarySecurityToken,
+    public X509Certificate getSignedCertificateFromCSR(String binarySecurityToken,
                                                      X509Certificate caCert, List certPropertyList)
             throws KeystoreException {
         byte[] byteArrayBst = DatatypeConverter.parseBase64Binary(binarySecurityToken);
@@ -635,7 +635,7 @@ public class CertificateGenerator {
 
     private static X509Certificate signCSR(JcaPKCS10CertificationRequest jcaRequest,
                                           PrivateKey privateKey, X509Certificate caCert,
-                                          List certParameterList) {
+                                          List certParameterList) throws KeystoreException {
 
         String commonName =
                 (String) certParameterList.get(PropertyIndex.COMMON_NAME_INDEX.getValue());
@@ -644,7 +644,7 @@ public class CertificateGenerator {
         int notAfterDays =
                 (Integer) certParameterList.get(PropertyIndex.NOT_AFTER_DAYS_INDEX.getValue());
         X509v3CertificateBuilder certificateBuilder;
-        X509Certificate signedCertificate = null;
+        X509Certificate signedCertificate;
 
         try {
             ContentSigner signer;
@@ -674,16 +674,20 @@ public class CertificateGenerator {
                     ConfigurationUtil.PROVIDER).getCertificate(
                     certificateBuilder.build(signer));
         } catch (InvalidKeyException e) {
-            //throw new CertificateGenerationException("CSR's public key is invalid", e);
+            String errorMsg = "CSR's public key is invalid";
+            throw new KeystoreException(errorMsg, e);
         } catch (NoSuchAlgorithmException e) {
-            //throw new CertificateGenerationException("Certificate cannot be generated", e);
+            String errorMsg = "Certificate cannot be generated";
+            throw new KeystoreException(errorMsg, e);
         } catch (CertIOException e) {
-            // throw new CertificateGenerationException(
-            //   "Cannot add extension(s) to signed certificate", e);
+            String errorMsg = "Cannot add extension(s) to signed certificate";
+            throw new KeystoreException(errorMsg, e);
         } catch (OperatorCreationException e) {
-            // throw new CertificateGenerationException("Content signer cannot be created", e);
+            String errorMsg = "Content signer cannot be created";
+            throw new KeystoreException(errorMsg, e);
         } catch (CertificateException e) {
-            //throw new CertificateGenerationException("Signed certificate cannot be generated", e);
+            String errorMsg = "Signed certificate cannot be generated";
+            throw new KeystoreException(errorMsg, e);
         }
         return signedCertificate;
     }
diff --git a/components/certificate-mgt/org.wso2.carbon.certificate.mgt.core/src/main/java/org/wso2/carbon/certificate/mgt/core/service/CertificateManagementService.java b/components/certificate-mgt/org.wso2.carbon.certificate.mgt.core/src/main/java/org/wso2/carbon/certificate/mgt/core/service/CertificateManagementService.java
index 2a969bfa1a..7810878bcf 100644
--- a/components/certificate-mgt/org.wso2.carbon.certificate.mgt.core/src/main/java/org/wso2/carbon/certificate/mgt/core/service/CertificateManagementService.java
+++ b/components/certificate-mgt/org.wso2.carbon.certificate.mgt.core/src/main/java/org/wso2/carbon/certificate/mgt/core/service/CertificateManagementService.java
@@ -54,6 +54,6 @@ public interface CertificateManagementService {
 
     String extractChallengeToken(X509Certificate certificate);
 
-    X509Certificate getSignCertificateFromCSR(String binarySecurityToken, X509Certificate caCert,
+    X509Certificate getSignedCertificateFromCSR(String binarySecurityToken, X509Certificate caCert,
                                               List certParameterList) throws KeystoreException;
 }
diff --git a/components/certificate-mgt/org.wso2.carbon.certificate.mgt.core/src/main/java/org/wso2/carbon/certificate/mgt/core/service/CertificateManagementServiceImpl.java b/components/certificate-mgt/org.wso2.carbon.certificate.mgt.core/src/main/java/org/wso2/carbon/certificate/mgt/core/service/CertificateManagementServiceImpl.java
index 71b1d32db7..dc8487219e 100644
--- a/components/certificate-mgt/org.wso2.carbon.certificate.mgt.core/src/main/java/org/wso2/carbon/certificate/mgt/core/service/CertificateManagementServiceImpl.java
+++ b/components/certificate-mgt/org.wso2.carbon.certificate.mgt.core/src/main/java/org/wso2/carbon/certificate/mgt/core/service/CertificateManagementServiceImpl.java
@@ -101,10 +101,9 @@ public class CertificateManagementServiceImpl implements CertificateManagementSe
         return certificateGenerator.extractChallengeToken(certificate);
     }
 
-    public X509Certificate getSignCertificateFromCSR(String binarySecurityToken,
+    public X509Certificate getSignedCertificateFromCSR(String binarySecurityToken,
                                                      X509Certificate caCert, List certParameterList)
             throws KeystoreException {
-        return certificateGenerator.getSignCertificateFromCSR(binarySecurityToken, caCert,
-                certParameterList);
+        return certificateGenerator.getSignedCertificateFromCSR(binarySecurityToken, caCert, certParameterList);
     }
 }