🐛 Handle case when java is not installed on system [skip ci]

src/patches.py

@@ -15,6 +15,7 @@ class Patches(object):
     @staticmethod
     def check_java() -> None:
         """Check if Java17 is installed."""
+        try:
             logger.debug("Checking if java is available")
             jd = subprocess.check_output(
                 ["java", "-version"], stderr=subprocess.STDOUT
@@ -27,6 +28,9 @@ class Patches(object):
                 logger.debug("Java 17 Must be installed")
                 exit(-1)
             logger.debug("Cool!! Java is available")
+        except subprocess.CalledProcessError:
+            logger.debug("Java 17 Must be installed")
+            exit(-1)
 
     # noinspection DuplicatedCode
     def fetch_patches(self) -> None: