EA-121178 Add exception handling and report diagnostics info

plugins/stats-collector/src/com/intellij/stats/personalization/impl/DayImpl.kt

@@ -16,6 +16,7 @@
 
 package com.intellij.stats.personalization.impl
 
+import com.intellij.openapi.diagnostic.Logger
 import com.intellij.stats.personalization.Day
 import java.text.ParsePosition
 import java.text.SimpleDateFormat
@@ -30,11 +31,20 @@ class DayImpl(date: Date) : Day {
     override val year: Int
 
     companion object {
+        private val LOG = Logger.getInstance(DayImpl::class.java)
         private val DATE_FORMAT = SimpleDateFormat("dd-MM-yyyy")
 
         fun fromString(str: String): Day? {
             val position = ParsePosition(0)
-            val date = DATE_FORMAT.parse(str, position)
+
+            val date: Date
+            try {
+                date = DATE_FORMAT.parse(str, position)
+            }
+            catch (e: NumberFormatException) {
+                LOG.error("Could not parse a date from string: $str. Collected data for the day will be skipped.")
+                return null
+            }
             if (position.index == 0) return null
             return DayImpl(date)
         }