[SCB-2584] enable checkstyle RegexpSingleline (#3098)

diff --git a/ci/checkstyle/checkstyle.xml b/ci/checkstyle/checkstyle.xml
index 5beaa31..0b73885 100644
--- a/ci/checkstyle/checkstyle.xml
+++ b/ci/checkstyle/checkstyle.xml
@@ -32,6 +32,11 @@
   <module name="NewlineAtEndOfFile">
   </module>
   <module name="RegexpSingleline">
+    <property name="format" value="Throwables.propagate\("/>
+    <property name="message" value="Throwables.propagate is deprecated"/>
+    <property name="severity" value="error"/>
+  </module>
+  <module name="RegexpSingleline">
     <property name="format" value="\s+$"/>
     <property name="message" value="Trailing whitespace"/>
     <property name="severity" value="error"/>