added missing cause exception to thrown RuntimeException

Author: hhund

codex-process-data-transfer/src/main/java/de/netzwerk_universitaetsmedizin/codex/processes/data_transfer/crypto/CrrKeyProviderImpl.java

@@ -58,7 +58,7 @@ public static CrrKeyProviderImpl fromFiles(String crrPrivateKeyFile, String crrP
 		}
 		catch (NoSuchAlgorithmException | InvalidKeySpecException | IOException e)
 		{
-			throw new RuntimeException("Error while reading CRR private-key from " + crrPrivateKeyFile);
+			throw new RuntimeException("Error while reading CRR private-key from " + crrPrivateKeyFile, e);
 		}
 
 		try
@@ -69,19 +69,17 @@ public static CrrKeyProviderImpl fromFiles(String crrPrivateKeyFile, String crrP
 				if (!Files.isReadable(crrPublicKeyPath))
 					throw new RuntimeException("CRR public-key at " + crrPublicKeyFile + " not readable");
 
-
 				crrPublicKey = PemIo.readPublicKeyFromPem(crrPublicKeyPath);
 			}
 		}
 		catch (NoSuchAlgorithmException | InvalidKeySpecException | IOException e)
 		{
-			throw new RuntimeException("Error while reading CRR public-key from " + crrPublicKeyFile);
+			throw new RuntimeException("Error while reading CRR public-key from " + crrPublicKeyFile, e);
 		}
 
 		return new CrrKeyProviderImpl(crrPrivateKey, crrPublicKey);
 	}
 
-
 	private final PrivateKey crrPrivateKey;
 	private final PublicKey crrPublicKey;